The Sitka Men's Kelvin Aerolite Hunting Jacket provides a highly versatile jacket that can work beautifully as a mid-layer under a shell or an outer layer. This jacket is lightweight and compressible thanks to synthetic PrimaLoft Gold Insulation with Cross Core technology, which is as packable and warm as dow while still staying warm when wet. Synthetic PrimaLoft Gold Insulation with Cross Core technology stays warm when wet while still being as compressible and warm as down Insulation is 35% recycled and infused with silica aerogel, which adds warmth despite being 95% air and thus extremely lightweight 20-denier polyester face won't wet out thanks to Durable Water Repellent finish 20-denier polyester backer Gusseted stretch cuffs for easy layering and shooting Hood is fitted to stay out of peripheral vision Chest pocket is deep and zippered to secure small essentials