Description of Marmot Reactor Full Zip Jacket Simple, super soft, lightweight pile jacket. Wear it alone on chilly days or as a zip-in mid-layer for extra warmth on the slopes. Features: Weight: 12 ozs / 340 g Shell material: 100% Polyester fleece (100 weight) 100% Polyester Fleece Zippered hand pockets for convenience Functionality Zippin™ compatible ability to zip in a fleece jacket for extra warmth