The Stretchdown Hooded Jacket weaves down insulation into pockets within a single stretch fabric, so the jacket moves instead of stiffening up the way most down jackets do. Inside, 700-fill RDS(R)-certified down delivers premium warmth sourced under the Responsible Down Standard's animal welfare requirements. An insulated hood and elastic-bound cuffs seal in heat, and the build works equally well over a base layer on the trail or under a shell higher up the mountain. What Our Gearhead(R) Experts Are Saying:"I've reached and twisted scrambling up a rock step in this without the down ever fighting me. It moves like a stretch fabric first and a puffer second."