STIO Swimwear

Frequently Asked Questions

• What makes Stio swimwear different from traditional swim trunks?

  Stio swimwear is built around a mountain-lifestyle philosophy rather than beach-only design, prioritizing durable, PFAS-free materials and mobility for river, lake, and multi-day outings. Expect construction that supports layering and active movement instead of relying on quick-dry or high-UPF tradeoffs, so pieces work as versatile outer layers on and off the water. The result is a more rugged, stewardship-focused approach to swim apparel meant for variable mountain conditions.
• Are Stio swim pieces PFAS-free, and how does that affect water resistance and durability?

  Yes, Stio has moved to PFAS-free formulations in recent product updates, meaning water repellency is achieved without "forever chemicals." To retain performance they use DWR treatments and technical fabric constructions along with abrasion-resistant weaves and reinforced seams, which balance water resistance and long-term durability. This approach aims to reduce environmental impact while keeping functional protection for active water use.
• How should I size Stio swimwear to ensure unrestricted movement and proper layering?

  Size Stio swim pieces for a snug-but-mobile fit so you can layer without losing range of motion; too tight can restrict movement and too loose can trap cold water during immersion. Stio follows standard sizing, so try on with the base layers or underlayers you expect to wear for your activities to confirm freedom of motion and comfort. If you plan multiple layers, consider sizing up slightly to preserve mobility without excess drag.
• How does Stio swimwear compare to a neoprene wetsuit for cold-water activities?

  Stio swimwear is designed as a versatile, breathable layer for mountain water activities and offers better mobility and dry-surface comfort than neoprene, but it does not provide the same insulating thickness or compression seal as a wetsuit. For short dips, river runs, or layered use where mobility and quick packability matter, Stio is a strong option; for prolonged immersion in very cold water, a neoprene wetsuit remains the safer thermal choice. Choose based on duration of exposure and how much insulation vs. mobility you need.
• What construction and care features help Stio swimwear last season after season?

  Stio emphasizes durable constructions such as abrasion-resistant fabrics, reinforced stitching, and seam treatments that extend service life and resist wear from rocks and repetitive use. To maintain performance, rinse freshwater after exposure to lake or river water, avoid aggressive detergents and high heat, and let pieces air dry to preserve DWR and fabric integrity. Regular care and treating items as technical outdoor layers will help them hold up across seasons.