The Samaya NANO BIVY was designed for ultralight and minimalist practices but also for a safe bottom-of-the-bag aspect during an alpine style race. Made from our tent materials it offers the perfect combination of lightness durability and performance. This waterproof and breathable bivy sack is the ideal partner for roaming. Designed to protect your sleeping bag from the elements it allows you to leave safely even without a tent. The dimensions of the Samaya NANO BIVY have been carefully thought out to accommodate your sleeping bag and mummy mattress creating a solid and protective set for your nights in the mountains.