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Details & Specs
The warmest sleeping bag in the Sea to Summit range, the Alpine Ap3 is the technical choice that delivers on performance in arctic or high-altitude conditions.
This bag has a contoured mummy design for efficient insulation, expedition sizing for space to wear extra layers and an oversized footbox to accommodate your boots. The Alpine has a waterproof yet breathable NanoShell to protect the RDS certified 850+ Loft ULTRA-DRY premium goose down from moisture. The side block baffles keep the 60/40 fill ratio, the vertical baffles on the chest prevent cold spots and down migration while the oversized neck collar and snug hood maintain warmth.
This bag has an oversized zipper draft tube to prevent heat loss with anti-snag material for easy use. There’s a full length two-way left side zip for easy access and a half zip on the right ventilate or free up your arms if necessary. You can also keep your devices warm so that they perform properly in the internal security pocket.
A seriously warm sleeping solution for cross-country skiing, mountaineering, and alpine climbing – the Sea to Summit Alpine Ap3 can be relied on to perform when you need it most.
-29°C comfort rating, -40°C lower limit
Contoured mummy design for insulation
Expedition sizing to accommodate extra clothing layers
Oversized footbox spacious enough for your boots if required
RDS certified 850+ Loft ULTRA-DRY premium goose down
Waterproof/breathable NanoShell™ fabric protects against moisture and wind
Full length two-way left side zip for access and a half zip on the right side for ventilation
Vertical baffles prevent down migration and cold spots
Oversized neck collar and snug hood maintains warmth
Internal security pocket
Not designed to pair with another bag
Storage cell and compression bag included
Snowys Comfort Rating:
Fill Ratio Top/Bottom:
Max. User Height:
160 cm Chest | 142 cm Hip | 131 cm Foot
212L x 83W cm
58L x 27W cm
NanoShell™ | Waterproof and Breathable
RDS 850+ Loft Premium Goose ULTRA-DRY Down™
Zip Draft Tube:
Neck Draft Tube:
With dual elastic adjustment
YKK #5 | Free-Flow 1/2 Right | Full Length Two-way Slider Left