A soft-knit essential with Helion™ stretch nylon and UPF 50+ for alpine lake swimming, days on the SUP, or summers at home.

A soft-knit short to wear over a suit is an essential for alpine lake swimming season and our Hylas serves that purpose perfectly. Designed for a flattering fit—dry or wet—it is made with Helion™ stretch nylon knit fabric that blocks sun at a UPF 50+ rating. The low-maintenance wide elastic waistband adjusts easily while a three-inch inseam hangs loose. Flat and flattering in back, this is the short to pack for summers at home or long days on the SUP.

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 Image Helion™


Helion™, 90% Nylon, 10% Elastane, 155 g/m2

Breathable and quick-drying Helion™ fabric protects against high-altitude rays with UPF 50+ rating. Constructed with 90% nylon, 10% elastane, Helion™ offers lightweight, 4-way stretch ideal for activities on and off the water. 

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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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  • UPF 50+ rating for excellent sun protection
  • Flatlock seams maximize comfort and streamline design
  • Wide waistband for flattering and comfortable fit
  • Self drawcord for adjustability
  • Printed interior labels for comfort next to skin
  • Heat transfer Stio® and pinecone logos
  • Weight: 3 oz
  • Imported
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