The Helium II jacket was designed for flash-storm protection when out on an exposed trail. At only 180-grams, this rain shell packs away into its own inner pockets, becoming the size of an apple. It’s made of waterproof and super-breathable Pertex Shield+ 2.5-layer fabric, which has a surprisingly strong 30-denier face fabric. This rain shell’s seams are also fully taped to ensure the most weatherproof seal. 

Pertex® Shield+ 2.5L
Waterproof, breathable with taped seams
Adjustable hood
YKK® AquaGuard® front zipper
Zippered napoleon pocket
Inner pocket doubles as stuff sack
Elastic sleeve cuffs
Drawcord hem