This regular length, Chinook Delta Heater, sleeping bag is ideal if you are looking for a mummy sleeping bag that is rated to -7°C.

The Delta Heater, sleeping bag features of Polarguard® Delta insulation, with a DuPont Tactel® Diamond rip-stop nylon shell.

This series of sleeping bags uses Polarguard® Delta, one of the lightest, high-lofting and compressible synthetic insulations made today. This patented continuous filament process has a high loft hollow fiber core for increased thermal efficiency and reduced weight, plus it is extremely tear-resistant and durable