Your layering system evolves dramatically with changes in the season and sport, but the Polartec Power Grid FZ Hoody is the faithful standby that never leaves the lineup. From mid-winter ice climbs and ski tours to shoulder season bouldering and backpacking, the Power Grid is our most technical midlayer fleece featuring 60% recycled polyester and a classic grid-backer construction that traps warmth and aids in moisture management.