Products
Smartwool — Women's Osa Vega Graphic Tank

Smartwool

Women's Osa Vega Graphic Tank

SKU: SW:002856:P45:L::1:
B

76/100

Safe to wear, but rough on the environment.

Safe to wear; production isn't clean — donate when done.

Material B · 76Health A · 100Eco · 63Label · high

Why this material grade?

This product scored 76/100 on the 7-axis material rubric, based on its composition of 50% Merino Wool, 50% Organically Grown Cotton. Blended from 50% Merino Wool, 50% Cotton — 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

Well-balanced fabric that should serve you well. Follow the care guide to maximize lifespan.

Breakdown

Composition

50% Merino Wool, 50% Organically Grown Cotton

All-natural fiber

🌱

Cotton biodegrades in 1-5 months. When you're done with this, it returns to the earth — not the ocean.

🐑

Wool is naturally antibacterial and self-cleaning. You can air it out between wears instead of washing — it'll stay fresh.

⚖️

Merino Wool (score 86) is carrying this blend. Cotton (score 65) is pulling it down.

Network

Cost per wear

rough estimate
36¢/wear · 100 expected wears

Strong cost-per-wear

How we got there

Base for this category: 100 expected wears.

× 1.00 for Merino Wool (mid-durability fiber, durability 66).

= 100 expected wears. $36 ÷ 10036¢/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.

30°

Wash

cold (30°C)

Bleach

Do not bleach

Dry

flat dry

Iron

low

P

Dry Clean

recommended

Cycle: delicateDetergent: mildSoftener: No

Best For

🏃Athletic Wear
Good

Good breathability (85) and moisture wicking (65) for light activity

🧥Winter Outerwear
Good

Good warmth (68) for cold weather

👕Everyday Casual
Good

Good comfort (84) and care ease (63) for casual wear

👔Formal/Office
Good

Good durability (66) and comfort (84) for office wear

😴Sleepwear
Good

Good comfort (84) and breathability (85) for sleeping

🩲Underwear
Good

Good breathability (85) and comfort (84) for undergarments

🌧️Rain/Weather
Good

Good moisture wicking (65) and durability (66) for weather protection

⛰️Outdoor/Hiking
Good

Good durability (66) and breathability (85) for outdoor activities

🌱Sustainable Fashion
Good

Good sustainability score (63)

Tradeoffs

Health Impact

Microplastic shedding · skin-contact synthetic load · likely chemical treatments

A100/100

Low health impact — predominantly natural fibers with no major treatment flags.

MicroplasticsLOW

Minimal

Skin contactLOW

0% synthetic

ChemicalsLOW

No flags

Eco Rating

63/100

Moderate impact — consider eco alternatives

Learn about eco ratings →

Biodegradability

Biodegradable

Materials will naturally decompose.

Health & environmental impact →

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.

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