Rab Alpine Bivi

The Pertex Shield Air fabric is specifically designed to be air-permeable, which significantly improves airflow compared to standard waterproof membranes. While no bivi is completely immune to condensation in extreme humidity, this fabric is highly effective at venting moisture while you sleep.

This is a minimalist shelter designed strictly for sleeping. It fits a standard sleeping bag and mat, but there is very little extra space for gear. You will need to keep your pack outside or use it as a pillow.

No, the Alpine Bivi is designed with a low-profile, sculpted shape to save weight and minimize wind resistance. It is intended for sleeping only, not for sitting up or hanging out.

Yes, the bathtub-style floor features taped seams and durable polyamide construction to keep water from seeping in from the ground. It is designed to keep you dry even when pitched on damp or muddy surfaces.

The Alpine Bivi is significantly lighter and more compact than a tent, making it ideal for fast-and-light missions where every ounce matters. However, it lacks the interior space, vestibule storage, and weather protection of a full tent, so it is best reserved for experienced users in specific alpine conditions.