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Sea To Summit
ApIII Sleeping Bag: -4F Down

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The next generation in dry and warm.

Nothing takes the fire out of your engines more than trying to sleep in a soggy down bag, so Sea To Summit designed the ApIII Sleeping Bag to block outside moisture and prevent condensation build-up during long stays at base camp. To achieve this feat, Sea to Summit made this bag with lightweight, breathable outer 3D NanoShell fabric with a Nano-DWR coating and a silicone condensation barrier just inside the shell fabric to expel any moisture that your body creates during the night.

Details

  • Rated down to -4F, this bag is best suited for winter camping, high alpine mountaineering, and ski touring
  • The 850-fill Eastern European goose down gives you superior loft and insulation for a better warmth-to-weight ratio than anything on the planet
  • The 20D polyester shell and lining fabrics provide the perfect mix of softness, durability, and breathability for long expeditions
  • Offset baffle construction, side block baffle, and a 60-40 (top-bottom) fill ratio prevents cold spots
  • Draft tube with lightweight YKK #5 zippers stop heat loss, and the micro anti-snag liner protects the soft inner fabric
  • Adjustable draft collar, cushioned hood, and anatomically tapered footbox keep the down as close as possible to your cold zones
  • An internal zippered chest pocket holds electronics close so your sat-phone batteries don't freeze up overnight
  • Includes a compression sack for trips, a mesh storage sack to preserve loft, and a laundry bag for safe washing once back home
  • Item #STS0100
Material
[shell] 3D NanoShell (20D polyester), Nano DWR, [lining] polyester (20D), [membrane/laminate] silicone condensation barrier
Insulation
850-fill down
Shape
mummy
Draft Collar
yes
Max User Height
(regular) 6 ft, (long) 6 ft 7 in
Shoulder Circumference
(regular) 60 in, (long) 61 in
Hip Circumference
(regular) 51 in, (long) 53.5 in
Foot Circumference
(regular) 41 in, (long) 42 in
Stuff Sack
yes
Storage Sack
yes
Degree
-4 F
European Norm Comfort Rating
10 F
Claimed Weight
(regular) 3 lb 8 oz, (long) 3 lb 15 oz
Recommended Use
mountaineering, alpine climbing, ski touring, winter camping
Manufacturer Warranty
lifetime

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