Winter runs, fitness skins or Nordic loops are all part of the game for our breathable, aerobic vest. 40-gram PeakFill Active—a highly breathable, quick recovery, spiral filament synthetic fill—supplies core-warming performance. Easily stuffed into spaces like a ski pack, it lofts back quickly when called on for rest-break warmth. Mechanical stretch and side-seamless construction enhance mobility and reduce friction.
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