The Helly Hansen Odin Stretch Hooded Insulator 2. 0 pairs PrimaLoft(R) Gold Active+ insulation with a 2-way stretch nylon ripstop shell, built to hold warmth without overheating during a hard backcountry push. Articulated elbows and a raglan sleeve keep the arms moving freely, whether it's worn alone or layered under a shell. A flat brim, elastic hood, and chin guard round out the protection when conditions turn rough. What Our Gearhead(R) Experts Are Saying:"I wore this skinning uphill on a cold morning and never had to stop to vent, even as my effort picked up. The stretch panels let my arms move through the pole plant without the jacket binding at the shoulder."