Comfy in the cold.
The Basecamp Thermolite BT 4 Sleeping Bag is Sea to Summit's warmest, fully-featured bag for camping in winter. Its Thermolite synthetic insulation keeps you toasty from late fall to early spring, and it stays warm in moisture-riddled environments. The bag's Perma Shell fabric pairs a water-resistant exterior with soft interior.
Sea to Summit equipped the Basecamp with a removable quilt that you can take on minimalist backpacking trips in summer. Loops all around the bag secure the quilt, a sleeping pad, and Sea to Summit's Aeros Pillow (both sold separate). This bag also features zippered foot vents, an adjustable hood, and draft tubes that line the dual full-length zippers.
- Spacious sleeping bag for comfortable camping
- 5F temperature rating ideal from fall to spring
- Thermolite insulation stays warm when wet
- Pillow and sleeping pad retainer loops
- Item #STS002P