ThermarestSaros 0F / -18C - Sleeping bag

When temperatures drop well below freezing, the Saros 0F / -18°C by Thermarest is ready to face the harshness of winter camping without weighing down your backpack. Thanks to its eraLoft™ synthetic fill, as compressible as it is efficient, you benefit from reliable insulation even in damp conditions. The hollow fibers lighten the whole without compromising on warmth—a true thermal miracle.

Designed for restless sleepers or simply humans, it features the W.A.R.M. fit, providing enough room to move naturally while keeping the warmth inside.

And to prevent sliding off the mattress at night like a bar of soap on wet tiles, the SynergyLink™ connectors ensure an effective link between your cocoon and your soft base. Removable for more freedom, of course. A choice companion for winter camping, chilly nights, and warm dreams.

• eraLoft™ fill: efficient and compressible, the water-resistant synthetic fill uses hollow fibers to reduce weight without sacrificing warmth.

• W.A.R.M. fit: the W.A.R.M. comfort ("with additional room for multiple positions") means you can choose various natural sleeping positions while preserving the sleeping bag's thermal efficiency.

• SynergyLink™ connectors: connection to the mattress for optimized thermal efficiency and comfort (removable for more versatility).

• Zoned insulation: maximizes warmth and optimizes weight by precisely distributing the fill where it is most needed.

• Toe-asis™ foot warmer: ergonomic foot warmer section to quickly warm up cold feet with a cozy welcoming cocoon.

• Quilt and blanket loops: adapt your sleep system to the conditions by adding our technical quilts or blankets to the sleeping bag for extra warmth.

• Additional features: draft collar to block heat loss, full-length zipper draft tube, snag-free zipper, drawcord hood, and zippered exterior pocket.

• Compression sack and storage bag included.