Sea To Summit Hamelin Synthetic Sleeping Bag -1oC - Red

Sea To Summit Hamelin Synthetic Sleeping Bag -1°C - Red: Performance Backcountry Sleeping Bag with Body-Mapped Recycled Insulation

Built for backpackers and outdoor adventurers who demand backcountry-capable performance from a synthetic sleeping bag. The Sea to Summit Hamelin Synthetic Sleeping Bag rated to -1°C in Red steps up from the Boab with a more technical Contour shape, body-mapped Revive Loft insulation placement, lighter 20D recycled fabrics, a technical hood with draught collar, and the Free-Flow dual zipper system — delivering a performance-oriented synthetic bag built for trekking, paddling, and backcountry camping across South Africa's varied and unpredictable conditions. For adventurers who need wet-weather-reliable warmth in a packable, responsibly manufactured sleeping bag, the Hamelin sets the standard.

Key Benefits:

* Body-Mapped Revive Loft Insulation: 100% RCS-certified post-consumer recycled multi-denier hollow-core polyester insulation strategically layered across the bag to maximise core warmth where it matters most — offset construction eliminates cold spots while maintaining warmth even when damp, outperforming down in wet coastal and mountain conditions
* Weight-Efficient Contour Shape: Relaxed mummy Contour profile provides significantly more room to move than a traditional mummy bag while remaining more weight-efficient than rectangular designs — ideal for side sleepers, figure-four sleepers, and those who need to roll and shift through the night without fighting the bag
* Free-Flow Dual Zipper System: Full-length YKK #5 side zipper with double sliders extends through the entire footbox for full quilt conversion, combined with a secondary half-length side zipper on the opposite side — allowing arms-free functionality, precise foot ventilation, and full flat-quilt configuration in a single bag
* Technical Hood and Draught Collar: Ergonomic technical hood cinches down completely for cold-night warmth retention, with a draught collar and full-length insulated draught tubes along the zipper preventing cold air infiltration — features that elevate the Hamelin above standard comfort-camping sleeping bags
* Lightweight 20D Recycled Shell and Liner: Lighter 20D bluesign-APPROVED recycled polyester shell and liner with non-PFAS DWR finish repel moisture more effectively than heavier fabrics — delivering a more packable, backcountry-capable bag without compromising sustainability credentials
* 1% for the Planet Contribution: Every Hamelin Sleeping Bag purchase contributes to Sea to Summit's 1% for the Planet commitment — supporting biodiversity conservation organisations protecting endangered ecosystems and wildlife worldwide

The Hamelin -1°C in Red sits between the comfort-focused Boab and the premium Ascent down range — the ideal choice for backpackers who spend nights in damp, cold, or unpredictable conditions and need synthetic insulation's inherent wet-weather advantage over down. Packed size for the Regular is 41 x 27.5 x 18cm at 8.4 litres, making it genuinely backpack-capable for multi-night South African wilderness trips. The Hamelin is compatible with Sea to Summit sleeping bag liners to extend its temperature rating further into winter conditions.

Technical Specifications:

* Temperature Rating: -1°C / 30°F Lower Limit (ISO 23537); Comfort Rating 3°C for women
* Extreme Rating: -18°C
* Insulation: Revive Loft — 100% RCS-certified, post-consumer recycled, multi-denier hollow-core polyester, body-mapped strategic placement, offset construction
* Shell: 20D bluesign-APPROVED recycled polyester with non-PFAS DWR finish
* Liner: 20D bluesign-APPROVED recycled polyester
* Shape: Contour — relaxed mummy with technical hood and draught collar
* Zipper: YKK #5 Free-Flow full-length side zipper with double sliders through footbox; secondary half-length zipper on opposite side
* Draft Tube: Full-length insulated draught tubes along zipper
* Hood: Technical ergonomic hood with draught collar
* Footbox: Angled shark fin profile for natural foot position
* Sizes Available: Regular, Long
* Packed Size (Regular): 41 x 27.5 x 18cm / 8.4 litres
* Packed Size (Long): 41 x 27.5 x 18cm / 9.6 litres
* Sustainability: 1% for the Planet product; bluesign-APPROVED; RCS-certified materials
* Colour: Red

Perfect For: Multi-day backpacking and trekking in South African wilderness including Drakensberg and Cederberg, kayak and paddle touring overnight camps in damp coastal conditions, trail running and fastpacking base camps, shoulder-season camping where wet-weather insulation reliability is critical, side sleepers and active sleepers who need room to move in a backcountry bag, adventurers upgrading from a comfort camping bag to a performance synthetic option, eco-conscious backpackers seeking responsibly manufactured backcountry gear

Ready to take your backcountry sleep system to the next level with a bag that performs when conditions turn damp? The Sea to Summit Hamelin Synthetic -1°C in Red delivers body-mapped warmth, Free-Flow ventilation control, and 100% recycled construction in a genuinely packable format that handles everything South Africa's backcountry throws at you. Free SA delivery included on your next adventure essential.