The Outdoor Research Helium Down Jacket features waterproof Pertex® Shield Diamond Fuse fabric on the collar, shoulders, and sleeves. It uses 100% responsibly sourced down, providing water and wind resistance. The jacket is durable, lightweight, and constructed with hybrid mapping. It has a single center-front zipper with no-snag webbing, an external chest pocket, dual internal stash pockets, brushed tricot hand pockets, and a left hand pocket that doubles as a stuff sack. It includes a carabiner loop with key clip and an elastic drawcord hem with low-profile binding.