evo.com | Stio Shell Jackets > You need a jacket that's been tested in the steep and deep ski runs you love. That's why the Stio Environ Jacket exists, to protect you from the elements when fun is the priority. With Stio's highly reputed PeakProof(TM) 3L construction, this jacket is super weatherproof and easily layerable on warmer days thanks to its non-insulated shell. Made to function for years, it is fully seam-sealed and backed by waterproof zippers on every exposed opening. Pit zips, pockets, a powder skirt, and a removable hood add customization, so you can be prepared for whatever the mountain has in store. RFID Pocket 150 Denier PeakProof(TM) 3L Plain Weave (100% Recycled Polyester) In our outdoor world, not all shell fabrics rate the same, which is why we decided to set a Stio(R) standard for mountain-rated protection you can trust when rough weather descends. Stio's new PeakProof(TM) rating ensures a Teton-tested level of waterproof technology and breathable comfort for elevated action in mountain environments. Two-Way Underarm Venting PeakProof Hydrophilic Membrane 20,000mm Waterproofness, 10,000 g/m2/24hrs Breathability 20 Denier Tricot Backer | Women's Stio Environ Jacket 2026 - Small Blue | Polyester