Sea To Summit Alpine 29 sleeping bag with feather 2024

The Alpine sleeping bag features the highest quality Ultra-Dry down and a contoured mummy shape for effective insulation.

With space to accommodate additional winter equipment and a filling power of 850+, this lightweight sleeping bag is especially suitable for extreme adventures in cold climates, allowing you to enjoy the outdoors with confidence and peace of mind.

Features

• Goose down with Ultra Dry Down treatment for increased water resistance in wet conditions.
• High-quality 10D recycled nylon, with its waterproof and breathable properties, offers additional protection and prevents condensation on the tent walls for optimal outdoor comfort.
• The Free Flow Zip system has been modified by removing the zip in the foot area to maintain maximum warmth.
• The double collar and anti-courant d'air tube allow optimal heat retention, providing extra comfort and warmth in arctic and cold conditions.
• Insulation: 850+ fill index, RDS certified, goose down treated with Ultra Dry Down for extra water resistance in wet conditions.
• Fabric: Shell and lining in 20 denier recycled nylon. Hood and feet in 10 denier waterproof-breathable nylon.
• Shape: Shipping mummy: large to accommodate both you and the gear you don't want to see freezing.
• Zip: Modified Free Flow closure system without zip in foot area: Main closure - full-length zip #5 with flap and two sliders. Secondary closure - 1/3 length #5 with flap and two sliders.
• Partition construction: Vertical partitions on chest, horizontal partitions on lower half and base, box-type wall construction on all.
• Collar: Double leakproof collar: snug-fitting front collar and tubular back collar.
• Hood: Generous, adjustable hood with two tactile adjustments. Fits a Sea to Summit regular pillow.
• Leakproof tube: Double feather leakproof tube along the top and bottom of the zips.
• Bag coupling: Compatible with Sea to Summit women's bags.
• Pillow integration: The regular Sea to Summit pillow fits into the hood.
• Maximum user size: R: < 185 cm / L: < 198 cm
• Total manufacturer weight: R: 1459 g / L: 1645 g
• Filling manufacturer weight: R: 1000 g / L: 1135 g
• Size of compressed bag: 26 L

Technologies

Ultra-Dry 850+ Loft
The highest performance down used in all Sea to Summit sleeping bags. The 850+ fill power means that one ounce (30 g) of down will expand by more than 850 cubic inches after compression. A higher fill power means that less down can be used to achieve the same temperature, which is important for high-performance sleeping bags. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) - a copy of the certification is supplied with every Sea to Summit sleeping bag. The down is responsibly sourced, RDS certified and treated with the environmentally friendly Ultra-Dry Down treatment.

Quiltlock system
The QuiltLock system uses press studs located at the shoulder and foot ends of Sea to Summit sleeping bags, along with the down foot box and down straps, to attach a down duvet to the sleeping bag. This adds thermal performance and versatility to your sleeping system: your integrated duvet now works for ultralight summer adventures and turns your three-season sleeping bag into a four-season sleeping system.

C0 DWR
Most of our products have already adopted PFC-free C0 water-repellent finishes. Our goal is to use 100% PFC-free C0 water-repellent finishes by 2025.

Responsible Down Standard (RDS)
All down used in our sleeping bags and quilts is independently certified according to the Responsible Down Standard (RDS). The RDS standard certifies down according to animal welfare requirements and guarantees its traceability from source to finished product. Purchasing RDS certified products demonstrates the demand for better animal welfare practices in the down and feather down supply chain. Sea to Summit is RDS certified.