Katabatic Gear Sawatch 15 vs Sea to Summit Spark SP III

Weight and specs compared for 2026 — and which one to choose.

Katabatic Gear Sawatch 15 is the lighter option — 9 g lighter than the Sea to Summit Spark SP III (1% less weight). If grams matter to you, that is the one to beat.

Spec	Katabatic Gear Sawatch 15	Sea to Summit Spark SP III
Weight	700 g · 0.700 kg · 1.54 lb	709 g · 0.709 kg · 1.56 lb
Brand	Katabatic Gear	Sea to Summit
Category	Sleep System	Sleep System

Katabatic Gear Sawatch 15

700 g

15F down quilt with 900+ fill power and a Pertex Quantum shell, packing down to roughly 7 liters for cold-weather trips.

Check price Full details →

Sea to Summit Spark SP III

709 g

850-fill down sleeping bag rated to 0°C / 32°F.

Full details →

Katabatic Gear Sawatch 15 vs Sea to Summit Spark SP III: which should you buy?

If saving weight is your priority, the Katabatic Gear Sawatch 15 wins — at 700 g it is 9 g (1%) lighter than the Sea to Summit Spark SP III (709 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

More sleep system comparisons

Katabatic Gear Sawatch 15 vs NEMO Equipment Tensor Elite Sleeping Pad Katabatic Gear Sawatch 15 vs Therm-a-Rest NeoAir UberLite Katabatic Gear Sawatch 15 vs NEMO Tensor Elite Ultralight Insulated Katabatic Gear Sawatch 15 vs Zpacks Solo Quilt 20F Katabatic Gear Sawatch 15 vs Nemo Tensor Ultralight Katabatic Gear Sawatch 15 vs Zpacks Classic Sleeping Bag 20F