Spotlight Pick
Spark SpI Sleeping Bag: 40F Down
Balanced option for paddlers who want a high-confidence all-round setup with strong value retention.
Loading experience...
Product Breakdown
Get a comfy nights sleep outdoors with the Sea to Summit Spark SpII 28 Down Sleeping Bag. Ultralight and compressible, its perfect for backpacking and alpine adventures.
Deep Dive
Why We Like The Spark SpII 28 Down Sleeping Bag
Experience ultimate comfort and convenience with the Spark SpII 28 Down Sleeping Bag by Sea to Summit. Perfect for backpackers, racers, cyclists, and alpine climbers, this ultralight and compact sleeping bag offers a minimalist design without compromising on a good night's sleep outdoors.
Featuring 850-fill down, this sleeping bag provides exceptional warmth-to-weight ratio, making it one of the lightest options available. The durable nylon shell is not only windproof but also prevents the down from breaking through, ensuring long-lasting performance. Meanwhile, the smooth nylon lining adds an extra layer of durability.
What sets this sleeping bag apart is the Ultra-Dry Down treatment, which enhances its resistance to moisture. So, regardless of the conditions, you can rely on this bag to keep you warm and comfortable throughout the night.
Product Details
Specs
Material [face fabric] 10D nylon, [lining] 7D nylon
Insulation RDS 850+ Loft Premium Goose Ultra-Dry Down
Shape contoured mummy
Zipper half-length
Max User Height [regular] 6ft, [long] 6ft 4in
Shoulder Circumference [regular] 59in, [long] 62in
Hip Circumference [regular] 51in, [long] 54in
Foot Circumference [regular] 35in, [long] 58in
Bag Length [regular] 6ft, [long] 6ft 4in
Draft Tube yes
Pockets none
Pad Retainer none
Venting two-way zipper
Fill Weight [regular] 10.6oz, [long] 12.2oz
Degree 28F
European Norm/ISO Comfort Rating 35F
European Norm/ISO Lower Limit Rating 28F
Storage Sack storage cell
Stuff Sack Ultra-Sil compression bag
Stuff Size [regular] 11 x 5in
Claimed Weight [regular] 1lb 1.3oz, [long] 1lb 3.8oz
Activity backpacking, mountaineering
Manufacturer Warranty lifetime
Alternatives
A curated comparison lane to quickly spot stronger options.
Spotlight Pick
Balanced option for paddlers who want a high-confidence all-round setup with strong value retention.
Read Next
A focused editorial path so readers can keep momentum after this review.
Deep dive first: this article expands the strategy, gear, and route decisions that complement the product you are viewing now.
Read featured guide