Looking for warmth without the weight? Marmot men's Featherless insulated jackets & vests let you enjoy the feel and performance of natural down without any allergens thanks to their 3M™ Thinsulate™ Featherless insulation. Plus, they keep insulating when wet, whether from perspiration or an errant spill while gathered ‘round the campfire. Men’s synthetic down jackets and puffer jackets are good for both the earth and cold days thanks to their synthetic fill. Engineered to replace natural down insulation with surpassed warmth & compressibility, Featherless winter coats & jackets are the next generation of synthetic insulation.