As the name may suggest, the Men's Summit L5 Ultralight Storm Jacket is The North Face's lightest and most packable Summit Series shell. Designed to keep you dry during surprise downpours and windy belays, this waterproof three-layer shell packs a mean punch for its 6-ounce construction. The attached, helmet-compatible hood lets you throw this jacket on over whatever you've got on when the clouds circle in and threaten to throw you off route and the zippered chest pocket lets you stow the whole shell inside and clip it to your harness to keep it on hand.