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The Mainsail frames are your day-to-day sunglasses that stay stylish while relaxed on land and ready for anything while out on water
Lock & Unlock with Pole
Wraparound fit
or laying down beautiful arcs on the groomed
it’s nimble and responsive—perfect for technical rivers
Stio 2026 Women's Environ Pant NRS Wild River Tube The Mainsail frames are yourStep into the wildest weather in Stio's signature Teton tested, all mountain ski pant with PeakProof 3L waterproof breathable technology, built for resort, side and backcountry. The Stio Environ Pant features recycled PeakProof 3L waterproof breathable technology and an active, articulated cut make this signature style the pinnacle of performance for both resort and backcountry use. The kickpatch features abrasion resistant CORDURA while storm sealing
