The Sea to Summit Spark SPII is an ultralight sleeping bag that is perfect for light backpacking or hiking adventures, overnights, and biking touring in warm weather. Featuring 850+ loft goose down insulation, a micro-weight 10D shell and 15D lining, it's one of the best warmth-for-weight minimalist sleeping bags available. The combination of its of size, weight and warmth make it an excellent summer sleeping bag and it can also be used as a booster bag, slipping inside another sleeping bag to add warmth.
10D UL Nylon fabric shell
15D nylon soft touch lining
850+ fill Ultra-Dry Goose Down insulation, which is treated to repel moisture
Ultra-Dry Down retains 60% more loft and absorbs 30% less moisture than untreated down
Contoured mummy shape with a full hood
Will keep you warm in temperatures down to 35°F
10D UL nylon shell treated with DWR and a 15D nylon soft touch liner for lightweight durability
1/3 length YKK zipper maximizes warmth and minimizes weight
Lightweight Ultra-Sil compression sack and storage bag included
Temperature rating: 35° F
User height: 6 ft., 6 in.
Shoulder girth: 60 in.
Hip girth: 52 in.
Foot girth: 37 in.
Fill weight: 9.9 oz.
Product weight: 18 oz.
Stuff sack size: 5 in x 10 in (uncompressed)
44 F / 35 F (EN Comfort Limit / Lower Limit)