For fast & light mountain missions, choose Rab’s Alpine Bivi. Lightweight & breathable, the Pertex Shield Air fabric is also waterproof. Taped seams & a bathtub base up protection levels further. A wide zipped entry aids access, & the zip is covered by a storm flap to block draughts. Ideal for mummy-shaped sleeping bags, the sculpted design saves weight & reduces bulk. Compact when stowed, it stashes easily into your mountain pack.