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A technical take on a mountain town go-to, the Alpin is built with a teched-up merino blend that offers performance but maintains classic good looks.

A technical alternative to your classic flannel, the Alpin Midweight Merino Shirt is constructed with PeakWool™, a proprietary textile developed exclusively for Stio®, that interweaves merino wool with synthetic filaments. It offers elevated performance, transcended comfort and extended versatility, adapting to any outdoor activity and fitting in everywhere it goes.

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 Image PeakWool™
56% Wool, 23% Tencel, 12% Recycled Nylon, 7% Nylon, 2% Spandex

PeakWool™ is a midweight fabric constructed with Merino Wool, Tencel, Recycled Nylon and Spandex. The natural properties of Merino regulate body temperature, keep odors at bay and manage moisture to keep you dry. The addition of synthetic fibers increases softness, adds strength and elevates its wicking properties. PeakWool™ excels in cold temps by keeping your core warm and dry, while enabling heat transfer when the tempo picks up.

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Climate Neutral

We completely offset the footprint of each order through our commitment to being climate neutral. As part of our mission we value being good caretakers of the mountain life and protecting the places where we play.


We are committed to building garments that are durable, timeless and continue to perform season after season. Over 50% of our product line incorporates preferred materials, which include organic cotton, recycled materials and responsibly-sourced down. We are committed to growing our preferred materials usage to 75% by 2025.

Trade-In Program

We believe a circular commerce system will design out waste and pollution, allowing for used clothing to be renewed and put back into use. Stio Second Turn™️ is our gear renewal program that allows customers to trade in and shop used apparel.

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  • Signature wool/tencel blend
  • Adjustable cuff and functional placket allows for easy roll
  • Bartacks reinforce tension points
Weight and Measurements
  • Weight: 17.6 oz.
  • Center Back Length: 30 1/8" (Size M)
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