Outdoor Research Helium Bivy - Slate CHideaHikeSocks sophisticated attachment at the lever

sophisticated attachment at the lever arm

low-profile buckles on the tough

Thanks to the innovative S-Café technology integrated in its fibres

And because of its tiny packed size and super light nature the Zero SL can be used as an extender to your existing sleeping bag

Yeast Extract

Outdoor Research Helium Bivy - Slate CHideaHikeSocks sophisticated attachment at the leverThe Helium Bivy is Outdoor Research's lightest, best selling, and most awarded bivy sack. Thru hikers and bikepackers love the Helium for its refined footprint and reduced weight and trust it for its durable, lightweight, waterproof Pertex Diamond Fuse technology. Incredibly quick to set up and break down, the ultralight Helium Bivy is 14% lighter than its last generation and has everything the outdoor minimalist needs to be comfortable. A clamshell