Sea to Summit Alpine AP III


spring 2011 regular long
Weight 3 lb 8 oz / 1580 g 3 lb 15 oz / 1790 g
Fill weight 2 lb 1 oz / 930 g 2 lb 3 oz / 1000 g
EN comfort 10 F / -12 C
EN lower limit -4 F / -20 C
EN extreme -44 F / -42 C
Fill 850-fill down
Shape Mummy
Max user height 6 ft 0 in / 185 cm 6 ft 8 in / 205 cm
Shoulder girth 60 in / 152 cm 61 in / 156 cm
Hip girth 51 in / 130 cm 54 in / 136 cm
Foot girth 41 in / 104 cm 42 in / 107 cm

Where to Buy

Manufacturer's Description

Visit Sea to Summit's Alpine AP III page.

Retailers' Descriptions

Here's what other sites are saying:

Nothing takes the steam out of your engine more than a restless night, so Sea To Summit designed the Alpine ApIII -4 Degree Down Sleeping Bag to both repel outside moisture and prevent condensation build-up on those epic alpine expeditions. A breathable, downproof 3D Nano Shell with Nano DWR and an interior barrier ensure its plentiful 850-fill Ultra-Dry Down stays lofty and toasty-warm, even at high-altitude base camp. Because you want to be rested for that glorious peak.


On Sale. Free Shipping. Sea to Summit Alpine APIII Sleeping Bag FEATURES of the Sea to Summit Alpine APIII Sleeping Bag Contoured mummy 3D NanoShell Ultra-Dry Down Differential cut shell with 3D side walls Off set baffles 60/40 fill ratio Side block baffle Anatomically tapered foot box Zip draft tube with anti-snag Neck draft tube with dual elastic adjustment Cushioned internal hood drawcord with dual adjustment 2 way YKK5 side zip Medium sized internal zip pocket Includes lightweight Ultra-Sil compression bag, mesh storage cell and laundry bag SPECIFICATIONS of the Sea to Summit Alpine APIII Sleeping Bag Comfort: 10Adeg F / -12Adeg C Lower Limit: -4Adeg F / -20Adeg C Extreme: -44Adeg F / -42Adeg C Ultra-Dry Down 850+ Loft 90% Down Cluster Premium European Goose Down Season Rating: Winter/Extreme Suggested Use: Base camp, winter backpacking, snow camping, ski touring, alpine climbing, expeditions Compressed Volume: 12.3 liter Compression Bag: Medium: 15 to 5 liter Length / Zip Option: Left zip SPECIFICATIONS for Regular Fill Weight: 32.8 oz / 930 g Bag Weight: 3 lbs 8 oz / 1580 g SPECIFICATIONS for Long Fill Weight: 35.3 oz / 1000 g Bag Weight: 3 lbs 15 oz / 1790 g

- Moosejaw

The Alpine APIII sleeping bag offers superior warmth and protection against the elements while alpine climbing and snow camping or during extended expeditions.


Ready for expeditions in the Karakoram, the Sea to Summit Alpine ApIII is chock full of features to make your tent away from home warm and comfortable. The ApIII will impress ski mountaineers, avid winter campers, and expeditioneers with its ability to withstand humidity day after day. Lightweight 3D NanoShell(TM) shell uses Nano Durable Waterproof Repellent (DWR) to provide a high level of water repellency while 3D Barrier promoting fast evaporation to keep humidity from affecting down loftContoured mummy shape is cut with a fitted hood, broader shoulder and large chest to maintain thermal efficiency and to accommodate extra layers in cold conditions Differential allows lining to conform to your body without overlaps or gaps to eliminate cold spots Offset baffle construction allows down to maintain full loft and minimize loss of heat through the seam lines Side block baffle technique allows a 60-40 (top-bottom) fill ratio keeps top down uncompressed and you warmer Anatomically tapered foot box accommodates the natural position of the feet and is roomy enough for liners Soft touch lining is down proof by construction, highly breathable and durable Oversized neck collar, draft tube, and cushioned internal hood seal with dual adjustments keep drafts out Anti-snag zipper system uses a high-density poly cloth hidden in the draft tube for smooth, snag-free zipping Full length, two way zipper side and foot zip allow not only infinite ventilation, but conversion from a traditional mummy to a flat duvet YKK #5 zippers allow this bag to unzip from the top and bottom for ventilation or to be used with another Sea To Summit bag (Trek, Traverse, and Alpine) of any size to create a double bag Medium sized internal pocket is great for storing electronics to preserve battery life in cold conditions Ultra-Sil(R) compression sack packs down from 15L to 5L Compression sack, mesh storage sack, and laundry bag included Max user height recommendations - 6'0'' Long - 6'7''

- OMCgear