Why 80/20: The Engineering Behind the InfiCare Lyocell-Cotton Blend

By Lydia Ruan, Founder of InfiCare. Updated May 2026.

The most common question we receive about InfiCare Pure-Touch is the simplest one: If Lyocell is so much better than cotton, why not just use 100% Lyocell? And if cotton is the historical standard, why introduce Lyocell at all?

The answer is that neither fiber, by itself, makes the best face towel. Each has unique physical properties that the other lacks — and the best product is engineered as a deliberate combination. Our 80% Lyocell + 20% Cotton blend is not a compromise. It is the result of materials engineering aimed at a specific outcome: a disposable face towel that is strong, soft, absorbent, lint-free, gentle on sensitive skin, and resource-efficient to produce.

This article explains what each fiber contributes, why the 80/20 ratio is the engineering optimum, and what we considered before arriving at this composition.

Quick Answer

Lyocell brings strength, wicking speed, lint-free surface, antimicrobial behavior, and resource-efficient production. Cotton brings plush softness, familiar tactile feel, internal absorbency capacity (via hollow lumens), and surface texture (working grip). In a spunlace nonwoven face towel, the strength-dominant fiber needs to be at least 75–80% to deliver mechanical performance, while the comfort-dominant fiber needs to be at least 15–20% to deliver the recognizable "natural touch" consumers want. The 80/20 ratio is the engineering point where both effects are fully expressed. Using 100% Lyocell would make the towel too slippery (Lyocell's smooth round fibers lack surface grip for wiping); using 100% cotton in a disposable spunlace format would make the towel weak when wet and prone to linting.

What Lyocell Contributes (80%)

Lyocell is the third-generation regenerated cellulose fiber, produced in a closed-loop process using NMMO solvent. We covered the full fiber science in our Materials Science guide. Here we focus on what Lyocell uniquely delivers that cotton cannot.

1. Structural Strength via Nano-Fibril Architecture

Lyocell fibers contain a fibrillar internal structure — bundles of microfibrils aligned parallel to the fiber axis, themselves composed of even smaller nanofibrils. This architecture has been measured by atomic force microscopy, with single Lyocell nanofibrils showing an elastic modulus of approximately 93 GPa — a stiffness comparable to engineering composites.

The practical consequence in a spunlace nonwoven face towel: load is distributed across thousands of aligned sub-fibers. When a wet towel is stretched, the force is shared across the entire nano-architecture rather than concentrated at weak points. Lyocell retains approximately 85% of its dry strength when wet, while standard viscose loses approximately 50%. This is why InfiCare towels do not shred, tear, or shed fibers under normal use.

2. Lint-Free Surface

Cotton fibers in a spunlace nonwoven are short staple fibers (typically 10–35 mm). Under abrasion against skin, eyelashes, or facial hair, the short cotton ends can pull free and deposit as lint. Lyocell fibers used in spunlace are also staple-cut, but the strongly bound microfibril structure means fragments do not separate from the parent fiber under typical use stresses. The 80% Lyocell content gives InfiCare its strictly lint-free quality.

3. Fast Wicking via Sub-Microscopic Channels

Lyocell's nano-fibril structure produces sub-microscopic channels between fibrils that rapidly transport moisture through the fiber. Per Lenzing AG's technical documentation: "the sub-microscopic canals between the individual TENCEL® nanofibrils regulate the absorption and release of moisture." The practical result is that Lyocell pulls moisture off the skin and across the towel surface very quickly — often faster than the eye can register. This is why InfiCare towels feel like they "lift" water from the face on a single pat rather than requiring rubbing.

4. Smooth Fiber Cross-Section (Friction Reduction)

Cotton fibers have a naturally twisted, ribbon-like cross-section with surface ridges. This is part of why cotton feels "grippy" — the irregular surface catches against materials it contacts. Against skin, that micro-friction is generally fine on healthy skin, but on compromised skin barriers, eczema-prone skin, or active acne, it can cause irritation. Lyocell fibers have a smooth, microscopically round cross-section that glides against skin without micro-abrasion.

5. Closed-Loop Resource Efficiency

Lyocell is produced in a closed-loop NMMO solvent system with over 99.8% solvent recovery — no carbon disulfide, no sulfur residue, minimal wastewater. Lyocell production uses approximately 600 liters of water per kg of fiber, compared to approximately 2,700 liters per kg for conventional cotton (a commonly cited average; some water-stressed cotton regions report figures over 10,000 liters per kg). The Lyocell used in InfiCare Pure-Touch is sourced from Sateri, using FSC-certified wood pulp from sustainably managed forests.

What Cotton Contributes (20%)

Cotton, despite being the older fiber, is not redundant in this formulation. It contributes physical properties that pure Lyocell cannot replicate.

1. Plush, Soft Hand-Feel from Hollow Lumens

Cotton fibers contain a hollow internal canal called a lumen. This lumen is what gives cotton its characteristic "fluffy" or "plush" feel — the fiber compresses gently and recovers, giving a soft, cushioned touch. Lyocell fibers are solid (no lumen), which is why pure Lyocell fabric can feel slightly "synthetic" or "smooth-but-not-cushioned" to first-time users. The 20% cotton content in InfiCare restores the familiar plush touch that consumers immediately recognize as "skin-friendly."

2. Surface Texture (Working Grip)

This is the property nobody talks about, but it matters: a face towel needs some grip to do its job. A perfectly smooth, frictionless cloth would slide across the skin without lifting cleanser residue, makeup particles, or oil. Cotton's irregular fiber surface provides what we call "working grip" — gentle micro-texture that catches and lifts contaminants without abrading the skin.

If we used 100% Lyocell, the towel would feel almost too slippery. It would glide across the face but not efficiently remove product. The 20% cotton restores the working grip that makes the towel actually function as a cleansing tool, while keeping the overall feel gentle.

3. Natural Absorbency Capacity

Cotton absorbs water primarily by drawing it into the hollow lumen and the spaces between fibers. Lyocell absorbs primarily through its sub-microscopic nanofibril channels. These are two different absorption mechanisms — and a blend leverages both. The 20% cotton adds reservoir capacity (water held inside lumens), while the 80% Lyocell adds wicking speed (water transported quickly through nano-channels).

4. Familiar Sensory Profile

Cotton is what consumers' skin has known for generations. From a sensory-marketing perspective — and from a consumer comfort perspective — the recognizable "cotton feel" reduces the cognitive friction of switching to a new product category. The 20% cotton content means InfiCare doesn't feel like an unfamiliar synthetic; it feels like a refined version of something you already trust.

Why 80/20 Specifically — and Not Some Other Ratio

The ratio is not arbitrary. In spunlace nonwoven fabric engineering, three considerations drive the blend percentage:

Threshold 1: Strength-Dominant Fiber Must Be at Least 70–80%

In a spunlace nonwoven, the dominant fiber's mechanical properties determine the fabric's strength characteristics. Below approximately 70% Lyocell, the wet strength of the fabric starts to behave more like the secondary fiber (cotton), which means losing the Lyocell wet-strength advantage. To preserve the structural integrity that allows our Beyond-Disposable durability claim — including survival through multiple wash cycles — we need Lyocell content above 75%.

Threshold 2: Comfort-Dominant Fiber Must Be at Least 15–20%

Below approximately 15% cotton content, the cotton's contribution to hand-feel and working grip becomes too subtle to register. Consumers report the towel feels "almost like Lyocell alone." For cotton's plush effect and surface texture to be sensorially recognizable, we need at least 20%.

Threshold 3: Diminishing Returns Above 80% Lyocell

Going from 80% Lyocell to 90% or 95% Lyocell provides marginal additional strength but visibly reduces the cotton contribution. At 90/10, consumers begin to describe the towel as "slippery" or "synthetic-feeling." The marginal gain in performance is not worth the loss in tactile recognition.

The 80/20 ratio sits at the intersection of these three thresholds. It is the smallest amount of cotton that delivers a recognizable cotton experience, paired with the highest practical Lyocell content for performance. This is what we call the engineering optimum.

What Each Fiber Cannot Do Alone

What We Considered and Rejected

Why Not 100% Lyocell?

We tested 100% Lyocell prototypes in our development phase. The product was structurally excellent — strong, absorbent, lint-free — but consistently described by testers as "feeling slippery against the skin," "not gripping cleanser," and "not feeling like a face towel." The technical performance was there, but the sensory experience was wrong. Lyocell alone is too smooth for the cleansing job.

Why Not 100% Cotton?

Cotton in a disposable spunlace nonwoven format has three significant limits we could not engineer around:

• Wet weakness: Short cotton staple fibers in a spunlace structure unravel when wet, particularly under mechanical agitation. This contradicts our Beyond-Disposable durability standard.
• Lint generation: Cotton sheds, depositing fibers on eyelashes, beard, and skin. This is an aesthetic and functional issue.
• Slow wicking: Cotton holds moisture in lumens but releases it slowly, meaning the towel stays damp on the skin longer — creating a bacterial-friendly micro-environment.

A reusable woven cotton washcloth doesn't face these problems because the woven yarn structure provides the strength. But a disposable spunlace face towel cannot replicate that strength from cotton alone.

Why Not Lyocell + a Different Second Fiber?

We considered Lyocell-Modal, Lyocell-Bamboo (viscose), Lyocell-Hemp, and Lyocell-Silk blends. Each was rejected for specific reasons:

• Lyocell-Modal: Modal is itself viscose-family with chemical residue concerns. Doesn't solve the chemistry transparency we wanted.
• Lyocell-Bamboo viscose: Same carbon disulfide manufacturing concern as standard viscose.
• Lyocell-Hemp: Mechanical properties acceptable, but hemp's rough texture works against the soft sensory profile.
• Lyocell-Silk: Premium feel but unsustainably expensive at scale, and silk is not vegan.

Cotton was the right answer because: (a) it's the universal comfort reference, (b) at 20% it's enough to deliver tactile contribution but not enough to inherit cotton's downsides, (c) it's renewable and biodegradable, and (d) consumers immediately understand what it is.

The Result: A Face Towel That Solves the False Choice

Before InfiCare, the consumer's choice in disposable face towels was effectively:

• Strong, durable, but with chemical residue and skin micro-friction: viscose (Clean Skin Club and most competitors)
• Natural, familiar feel, but weak when wet and lint-shedding: 100% cotton spunlace (DermaTech and similar)
• Premium feel but slippery and unfamiliar: hypothetical 100% Lyocell (not currently in market because of poor sensory match)

The 80/20 Lyocell-Cotton blend deliberately resolves the false choice. Strength and softness. Speed and reservoir capacity. Smooth glide and working grip. Sustainability and familiarity. Engineering precision and consumer comfort.

This is the InfiCare Pure-Touch design philosophy: not a compromise between two fibers, but the deliberate combination of their best properties.

Frequently Asked Questions

Why not 90% Lyocell + 10% Cotton for more strength?

We tested this. At 90/10, the cotton contribution is too subtle to be sensorially recognizable. Consumers in blind tests described 90/10 prototypes as "feeling like Lyocell" rather than "feeling like a Lyocell-cotton blend." The marginal mechanical gain doesn't justify the loss of tactile cotton contribution.

Why not 70% Lyocell + 30% Cotton for more softness?

At 70/30, the wet strength advantage of Lyocell begins to degrade. The cotton becomes structurally significant enough that the fabric's wet-state behavior shifts toward cotton's properties — which means losing the Beyond-Disposable durability claim. We could not justify trading durability for marginally additional softness, when 80/20 already delivers a fully recognizable cotton feel.

Is the cotton in InfiCare organic?

The cotton component meets OEKO-TEX Standard 100 Class I residue thresholds (the strictest tier, required for products in direct contact with babies' skin). This standard tests for pesticide residues, heavy metals, formaldehyde, and over 100 other potentially harmful substances. Whether the cotton is certified organic by USDA or equivalent is a separate certification path; OEKO-TEX Class I addresses the practical consumer safety question of "what's actually on the fiber that will touch my skin."

Where is the Lyocell sourced from?

InfiCare sources its Lyocell exclusively from Sateri, one of the largest producers of sustainable cellulose fibers globally. Sateri uses FSC-certified wood pulp from sustainably managed forests and operates closed-loop production with industry-standard solvent recovery.

Could the 80/20 ratio change in future product versions?

We don't anticipate it. The 80/20 ratio is at a stable engineering optimum based on three independent thresholds (wet strength, comfort recognition, performance ceiling). Any future product variations would be more likely to come from gsm changes (thicker or thinner fabric), size changes (different sheet dimensions), or premium variants (e.g., adding aloe vera or chamomile infusion) — not from changing the core blend ratio.

How does the blend affect biodegradation?

Both Lyocell and cotton are 100% plant-based cellulose fibers. Lyocell biodegrades fully in marine conditions within 30 days (per Scripps Institution of Oceanography research). Cotton biodegrades more slowly (typically months in soil). The 80/20 blend biodegrades at approximately the Lyocell-weighted pace overall, retaining the rapid environmental clearance that's part of why we use Lyocell. Both components are TÜV Austria certified compostable in home and industrial conditions.

Sources and References

• Lenzing AG. TENCEL™ Lyocell Fiber Technical Specifications. (85% wet tenacity, closed-loop NMMO process, sub-microscopic moisture channels.)
• ScienceDirect. Lyocell Fiber — an overview. Fibrillar structure and crystallinity.
• ResearchGate / Composites Part A. Mechanical properties of Lyocell fibers by nanoindentation. AFM measurement of nanofibril elastic modulus at 93 GPa.
• Sateri. Lyocell production, FSC sourcing, and sustainability disclosures.
• Scripps Institution of Oceanography, UC San Diego. Marine biodegradation study of cellulose-based fibers, demonstrating Lyocell biodegradation within 30 days.
• TÜV Austria. Biodegradability and compostability certifications for Lenzing fibers in soil, freshwater, marine, home compost, and industrial compost environments.
• OEKO-TEX Association. Standard 100 Class I certification protocol.
• Industry water footprint data. Cotton: ~2,700 L/kg average (varies by region, up to 10,000+ L/kg in water-stressed regions). Lyocell: ~600 L/kg.
• Royal Society of Chemistry. Environmental challenges of disposable wipes. RSC Sustainability, 2025.
• Cotton fiber morphology research. Hollow lumen structure and natural-twist surface, as documented in standard textile science literature.

InfiCare is Canada's first disposable face towel brand engineered with a deliberate Lyocell-Cotton blend. Founded by Lydia Ruan, a Canadian mother of four whose husband is a neuroscience researcher at Toronto's SickKids hospital. Based in Scarborough, Ontario.

*Certifications (OEKO-TEX® Class I & TÜV Austria) apply to our Sateri-sourced Lyocell fiber. Details at sateri.com.

For a brand-by-brand comparison of disposable face towels on the Canadian market, see Best Disposable Face Towels in Canada 2026.

Shop InfiCare Pure-Touch → Read the Materials Science Guide → Read about Beyond-Disposable →