Products
Uniqlo — HEATTECH Pile Lined Sweatpants

Uniqlo

HEATTECH Pile Lined Sweatpants

SKU: E479617-000
C

Safe to wear, but rough on the environment.

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

Quality C · 60Health B · 72Eco · 37

Why this grade?

This product scored 60/100 based on its composition of 58% Cotton, 39% Polyester, 3% Spandex. Blended from 58% Cotton, 39% Polyester, 3% Spandex — the overall score is a weighted average based on each material's proportion.

C (55-69): Average — typical blend, reasonable for everyday wear.

Composition

58% Cotton, 39% Polyester, 3% Spandex

Average quality, high synthetic content

Decent for everyday wear, but the synthetic content means microplastic shedding and it won't biodegrade. Consider natural alternatives for your next purchase.

🔬

Every wash of synthetic fabric releases up to 700,000 microplastic fibers into waterways. Use a Guppyfriend bag to catch them.

🌍

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.

Eco Rating

37/100

High environmental impact

Learn about eco ratings →

Biodegradability

Not Biodegradable

Materials will persist in the environment for decades.

Health & environmental impact →

Health Impact

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

B72/100

Moderate health impact — some synthetic content or possible chemical treatments. Rotate with natural-fiber alternatives where you can.

MicroplasticsMEDIUM

700,000 fibers/wash

Skin contactMODERATE

42% synthetic

ChemicalsLOW

Antimony

  • Antimony (trace): Virgin polyester contains trace antimony from PET production. Recycled polyester reduces but does not eliminate it.
🌿 Find plastic-free alternatives →How we score health impact →Not medical advice — based on material composition.

Care Guide

Washcold (30°C)
Cycledelicate
Detergentregular
BleachDo not bleach
Dryline dry
Ironlow
Dry Cleanavoid
SoftenerNo

Best For

👔Formal/Office
Excellent

Excellent durability (70) and comfort (66) for office wear

👕Everyday Casual
Good

Good comfort (66) and care ease (81) for casual wear

⛰️Outdoor/Hiking
Good

Good durability (70) and breathability (62) for outdoor activities