The Mammut Altitude Down Winter is a longer version of the high end down sleeping bag that provides outstanding protection and insulation in the toughest conditions.
The 990g of 800cuin European goose down, high quality materials and the cleverly designed details make the Altitude Down Winter long the ideal choice for those looking for a longer sleeping bag for expeditions at extreme altitudes. The Altitude series are the warmest Mammut sleeping bags and are designed for use in the Arctic and at altitude.
More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: Down Sleeping Bags.
Lightweight Trinity construction provides greater protection and better insulation in foot and head areas
Box Construction: ensures greater fill power, an anatomically better fit and noticeably improved heat insulation
Advanced Baffling chamber construction stops down from slipping and therefore prevents cold bridges when lying on your side and when the upper body is raised
Differential Cut improves fill power, insulation capacity and saves weight
shelterTX™ membrane material: waterproof and breathable
Two-layer, 9-chamber construction
12-chamber hood provides maximum protection from cold in head area
Large warm collar prevents heat loss
Large internal zipper pocket
Contains textile products of animal origin (down or leather)