FabricIQ
Reading the label…
01Verdict
Strong across the board — well-made, safe to wear, and low planet cost.
Best for Daily wear, no caveats.
Material B · 79Health A · 98Eco · 82Label · high
Why this material grade?
This product scored 79/100 on the material-quality rubric (durability, comfort, breathability, warmth, moisture-wicking, care-ease), based on its composition of Lyocell 95%, Spandex 5%. Sustainability is scored separately as the Eco Rating. Blended from 95% Lyocell, 5% Spandex — the score is a weighted average based on each material's proportion.
B (70-84): Good material composition — above average across most axes.
Good quality, eco-friendly
Solid fabric with strong environmental credentials. Lyocell (95%) is doing the heavy lifting. This is a smart buy.
Great fabric value
$10Better-than-typical fabric for this category, at a below-median price.
$0.13 per quality point Category median: $27 · grade B
Fabric value only — compares material quality to price vs other underwear. Construction, fit, and brand aren't measured.
02Breakdown
Composition
Lyocell 95%, Spandex 5%
Plastic-based — sheds microplastics in wash
Added Apr 1, 2026 · Data last updated Apr 1, 2026
Sustainability is scored separately — see the Eco Rating below.
🌍
This fabric will take 200+ years to decompose. That means a shirt you buy today will still exist in the year 2226.
🧺
Dryer heat destroys spandex/elastane over time. Your leggings and stretchy clothes will last 2x longer if you skip the dryer.
⚖️
Lyocell (score 80) is carrying this blend. Spandex (score 55) is pulling it down.
03Network
Cost per wear
rough estimate12¢/wear · 80 expected wears
Strong cost-per-wear
How we got there
Base for Underwear: 80 expected wears.
× 1.00 for Lyocell (mid-durability fiber, durability 65).
= 80 expected wears. $10 ÷ 80 ≈ 12¢/wear.
Missing GSM — this is a category-level estimate, not garment-specific. Expect ±30% variance.
Real life is messier than a formula: how often you wash, how you wash, whether you wear it inside-out, dry on low — all of it shifts the number. This is the ceiling under reasonable care.
Care Guide
Decode symbolsWash
cold (30°C)
Bleach
Do not bleach
Dry
line dry
Iron
Best For
🏃Athletic Wear
GoodGood breathability (79) and moisture wicking (67) for light activity
👕Everyday Casual
GoodGood comfort (87) and care ease (62) for casual wear
👔Formal/Office
GoodGood durability (65) and comfort (87) for office wear
😴Sleepwear
GoodGood comfort (87) and breathability (79) for sleeping
🩲Underwear
GoodGood breathability (79) and comfort (87) for undergarments
🌧️Rain/Weather
GoodGood moisture wicking (67) and durability (65) for weather protection
Better Alternatives
Higher-rated underwear products — each card shows how much better this alt scores vs your current product.
04Tradeoffs
Health Impact
Microplastic shedding · skin-contact synthetic load · likely chemical treatments
A98/100
Low health impact — predominantly natural fibers with no major treatment flags.
Microplastics LOW
Very low
Skin contact LOW
5% synthetic
Chemicals LOW
No flags
Biodegradability
Not BiodegradableMaterials will persist in the environment for decades.
What this score doesn't measure
- ×Fiber grade. Staple length, micronaire, strength. "100% cotton" could be short-staple upland or long-staple Pima — same label, very different fabric.
- ×Yarn processing. Singles count, ply (single vs two-ply), spinning method (open-end vs ring-spun vs compact), mercerization. Invisible from any label.
- ×Knit / weave structure. Single jersey vs interlock, knit tightness. A loose knit pills; a tight knit lasts.
- ×Fabric weight (GSM). One construction signal among several — and high GSM can come from loose cheap yarn just as easily as from fine tight yarn. We have it for blank manufacturers, rarely for retail.
- ×Pre-shrink processing. Sanforized cotton shrinks ~1%; non-sanforized can shrink up to 10%. Not visible from the composition tag.
- ×Construction quality. Stitch density (SPI), seam types, collar geometry, manufacturing tolerances (AQL). These often matter more than the fiber itself.
- ×Specific chemical loads. Health Impact flags "likely PFAS / possible formaldehyde" from composition × category — we don't lab-test individual SKUs.
We rate the fabric, not the garment. Composition is the floor of what you're guaranteed to be getting — most shoppers don't have that.
05Action
