Siku Fiber -6F/-21C Sleeping Bag - Women's

The Mammut Siku Fiber is a women's sleeping bag built for cold-weather use, carrying a temperature rating of -21 degrees Celsius (or -6 degrees Fahrenheit). It uses lightweight synthetic fiber insulation, making it a practical choice for conditions where warmth-to-weight ratio matters. The shell and lining incorporate a noise-reducing material, so movement during the night does not disrupt sleep. With a warmth rating of 4 out of 5, this bag sits firmly in the cold-weather end of the spectrum, suited to winter camping or high-altitude expeditions where temperatures drop well below freezing. The women's-specific cut is shaped to provide a closer, more efficient fit that helps retain body heat. Overall, the Siku Fiber balances genuine cold-weather performance with thoughtful construction details aimed at comfort during extended nights in demanding environments.

Category

Sleeping Gear

Brand

Mammut