Isotrope Women's Longsleeve
Isotrope Women's Longsleeve
Isotrope Women's Longsleeve
Isotrope Women's Longsleeve

Isotrope Women's Longsleeve

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Cozy yet breathable, the Isotrope Longsleeve is your companion for all-season adventures. Indoors or outdoors, you’ll remain cool, covered, and comfortable with a biobased coating designed to keep moisture away from your skin. 

Featuring the world’s first ever 100% biobased wicking finish, developed with microalgae oil.


  • Performance engineered 
  • Mid-weight for layering in the cold or as a staple everyday longsleeve
  • Wear tested by our FOW for durability and comfort
  • Mock Neck 
  • Longer Raglan Sleeves
  • Convertible Thumbholes
  • Recycled elastane Roica for stretch and movement


  • Petroleum-free MiDori® bioWick finish derived from microalgae oil
  • Rapid moisture wicking
  • Quick drying

We take pride in sourcing materials that are held to the highest environmental standards.

OEKO-TEX: ensures that the product is tested for harmful substances while manufactured with environmentally friendly processes and socially responsible working conditions
Global Recycling Standard (GRS): guarantees recycled products that reduce the harmful impact of production on the environment and people


  • 93% Recycled Nylon
  • 7% Recycled Elastane
  • Form Fitted.
  • Nina is 5'5" and wearing a size XS.

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In the Wild

Powered By Microalgae

MiDori bioWick is the world's first 100% biobased wicking coating made from microalgae oil.

Love it or Return it

If you do not love your apparel, return it for a full refund.
100% Satisfaction Guaranteed.

Our product are designed with precision in Salt Lake City, and we're confident that you'll love them as much as we do.

Customer Reviews

Based on 2 reviews
My New Favorite Shirt

Incredible design and fit! I've been wearing the isotrope as a ski base layer for a few weeks, and I've loved everyday so far! A sleek and flattering fit with longer sleeves that I can tuck my hands into when they get cold. I wear a medium, and it fits perfectly. If you would rather a loose fit, then you may want to size up. Perfect for all activities, I'm already looking forward to wearing this for biking this summer!

The all occasion, all season shirt

The sleek design and endless comfort of this shirt has been a game changer for me. I was lucky enough to get my hands on this shirt in early February and mainly used it under my layers for ski touring. It fit nicely under my bibs and was cool yet warm enough to support me in my uphill skin. The thumb holes were a great addition when I was too warm to wear gloves but too cold to not have some coverage. I fell so in love with this shirt while touring that I had to give it a go as an around-town essential. Not only does it have a super flattering cut and comfy mock neck, but I have the option to dress it up under some overalls or with jeans, and the option to make it casual as a yoga LS or around house doing chores. If you are looking for a looser fit, I would recommend sizing up as this is a form fitting shirt. I'm 5'9" typically wear a women's L and opted for the XL.