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