The Hamelin Synthetic Sleeping Bag -9C|15F by Sea to Summit delivers technical performance and comfort for the backcountry adventurer.

Built to withstand damp conditions while maintaining warmth, this bag features strategically placed layers of recycled Revive Loft insulation and a weight-efficient Contour shape that accommodates various sleeping positions. The technical hood and fitted draft collar work with full-length draft tubes to trap precious warmth, while the Free-Flow zip system with double sliders extends through the footbox for customizable ventilation. A secondary side zipper provides arms-free functionality when you need to reach for your midnight snack or morning coffee.

Going beyond comfort to embrace sustainability, the Hamelin Synthetic Sleeping Bag -9C|15F utilizes RCS-recycled and bluesign-APPROVED materials throughout its construction. As part of Sea to Summit's 1% for the Planet commitment, this sleeping bag proves that performance and environmental consciousness can coexist in the outdoors.

• ISO-tested temperature ratings with -9°C/15°F lower limit for reliable cold-weather performance
• Weight-efficient Contour shape ideal for side sleepers and natural movement
• Free-Flow zip system with full-length main zipper and secondary side zipper for versatile ventilation
• Strategic Revive Loft insulation placement maximizes warmth where needed most
• RCS-recycled materials and bluesign-APPROVED construction for reduced environmental impact