The Rab Men's Atmos Jacket has minimalistic features to keep its weight down so you can climb alpine in one of the lightest jackets around. A 3 layer Pertex Shield membrane gives this jacket superb waterproof and protection and breathable comfort. Fully taped seams and YKK Aquaguard zippers over the pockets and front opening help prevent a single raindrop from touching your skin. The Atmos's slim fit reduces bulk without impeding your mobility. The minimal hood is helmet compatible, and it has a stiffened rim to stay out of sight while you're belaying. Hook and loop cuffs close cold drafts out of your sleeves, and a drawcord at the hem keeps the jacket snug around your hips so it doesn't rise over your harness. The zippered A line pockets are always accessible even with a backpack or harness on.