STIO
Stio Mens Fernos Insulated Vest in Mountain Shadow
Stio Mens Fernos Insulated Vest in Mountain Shadow
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Winter runs, fitness skins or Nordic loops are all part of the game for our warm, breathable and uber-aerobic Fernos Vest. The key to its core-warming performance is 40-gram PeakFill™ Active Insulation, a highly breathable, quick recovery, spiral filament synthetic fill. Easily compressible into small spaces like a ski pack or running vest, it lofts back promptly when called on for treeline, ridgeline or rest-break warmth. Mechanical stretch and side-seamless construction enhance mobility and reduce layering friction. A single zip chest pocket secures a wallet and keys, while a rear drop tail and reverse coil YKK® zipper complete the fast, streamlined aesthetic.
- Soft, microfiber shell with PeakFill™ Active synthetic insulation
- Zippered hand pockets secure essentials
- Regular Fit: A casually shaped design that’s not too tight and not too baggy




