Snugpak Sleeper Extreme Sleeping Bag — Black

The Sleeper Extreme is Snugpak's mountain and expedition sleeping bag, built for those who operate or travel in severe cold. With a comfort rating of -7 °C and a lower limit of -12 °C, it covers the hardest nights of cold-weather seasons at altitude or in light arctic environments, weighing 2 100 g and compressing to a packable volume with the included compression sack.

The 2 100 g weight is a deliberate trade-off: the Sleeper Extreme is not the lightest bag on the market at those temperatures, but that mass translates into insulation that retains heat evenly even after consecutive nights in wet conditions, where lighter and less lofty materials show their greatest weaknesses. For those moving on foot over long routes, weight is a factor worth considering; for those arriving by vehicle or distributing a load across multiple pieces of kit, the ratio of thermal performance to purchase price is hard to match.

The left-side zip runs the full length of the bag and allows it to be opened and closed with one hand, even with gloves on. The hood is adjustable via an elastic drawcord and moulds around the head to reduce heat loss at the neck — a critical area at the lowest temperatures.

Key points

• Comfort rating -7 °C, lower limit -12 °C: suited to winter camping, extended operations at altitude and subarctic environments.
• Full-length left-side zip: manageable with gloves on, without having to expose your hands to the cold.
• Adjustable hood with elastic drawcord: reduces heat loss from the head, which is the primary source of heat loss on the coldest nights.
• Weight 2 100 g: more insulation than comparable ultralight bags, with greater capacity to retain heat in damp conditions.
• Supplied with compression sack: reduces packed volume without any additional tools.

In the box

• Snugpak Sleeper Extreme sleeping bag
• Compression sack