The Revlo Hybrid Hoody pairs PrimaLoft insulation through the body with zoned polyester-spandex fleece panels at the sides and sleeves, so it moves with us instead of stiffening up like a standard puffer. The face fabric runs on 100% pre-consumer recycled 20D nylon, cutting down on new material without giving up warmth. It stuffs into its own pocket when the temperature climbs, so there's no reason to leave it behind. What Our Gearhead(R) Experts Are Saying:"I've reached overhead loading a truck bed in this and never felt the jacket fight me the way a straight puffer does. The side panels flex right where my arms actually move."