The Sitka Men’s Kelvin Aerolite Hunting Vest is lightweight, compressible, and very warm for an easy-to-pack added layer for backcountry hunts. This versatile piece can be worn under a shell for extra core insulation or as an outer layer, and traps heat in thanks to synthetic PrimaLoft Gold Insulation with Cross Core technology - as warm and compressible as down while staying warm when wet. 60g Synthetic PrimaLoft Gold insulation with Cross Core technology is as warm and compressible as down but stays warm when wet Lightweight insulation is 35% recycled Insulation infused with silica aerogel, which is nearly weightless and composed of over 95% air and provides warmth 20-denier polyester face won’t wet out thanks to Durable Water Repellent 20-denier polyester backer Zipper chest pocket is deep for essentials storage Style: 50258