The Endeavor is a lightweight hybrid women's jacket, designed for warmth and maneuverability during cold weather training and endurance activities. It has a lightly insulated hood, core, and back panel utilizing PrimaLoft® ThermoBall™, which is a patented synthetic insulation created to retain heat even when wet. ThermoBall™ does this by grouping small synthetic-fibre clusters to deliver heat-trapping warmth at a ratio similar to lightweight down. Stretchy fleece sides and sleeve improve mobility, and the ribbed sleeve cuffs add comfort. The Endeavor comes in a slim, feminine fit, and features an adjustable hood and two zippered hand pockets.