The Thermarest Hyperion 32F/0C Sleeping Bag is a premium ultralight solution for professional mountaineers and backcountry adventurers. Utilising 900-fill Nikwax Hydrophobic Down and box baffled construction, it provides high performance warmth in a compact package. This bag includes SynergyLink connectors to integrate with a mattress for optimal thermal efficiency during moderate temperature treks. It is one of the lightest technical bags in its class, making it ideal for fast and light objectives.