Products
MUJI — Lyocell Blend Front Open Trunks

MUJI

Lyocell Blend Front Open Trunks

UnderwearSKU: 4548076974178
B

Safe to wear, but rough on the environment.

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

Quality B · 73Health A · 100Eco · 68

Why this grade?

This product scored 73/100 based on its composition of 50% Cotton, 50% Lyocell. Blended from 50% Cotton, 50% Lyocell — the overall score is a weighted average based on each material's proportion.

B (70-84): Good quality — above average across most metrics.

Composition

50% Cotton, 50% Lyocell

Good quality

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

🌱

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

Eco Rating

68/100

Moderate impact — consider eco alternatives

Learn about eco ratings →

Biodegradability

Biodegradable

Materials will naturally decompose.

Health & environmental impact →

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

Care Guide

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

Best For

🏃Athletic Wear
Good

Good breathability (84) and moisture wicking (54) for light activity

👕Everyday Casual
Good

Good comfort (84) and care ease (69) for casual wear

👔Formal/Office
Good

Good durability (63) and comfort (84) for office wear

😴Sleepwear
Good

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

🩲Underwear
Good

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

🌱Sustainable Fashion
Good

Good sustainability score (68)