The Mountain Equipment Ion Bivi bivy sack, lightweight and water-resistant, is designed for mountaineering. Its DRILITE® LOFT™ outer shell ensures waterproof and breathable protection, while the fully taped seams provide complete waterproofing. The tapered mummy design reduces weight without compromising comfort, and the large hood with drawcord offers extra protection. The Offset Sharks Toe™ footbox provides ample space for movement while retaining body heat. Conquer the peaks more safely with the Ion Bivi!