Sea to Summit · Sleeping Bags
The Spark Pro Sleeping Bag is an ultralight 15°F down mummy bag designed for three-season backpacking. It features 950+ fill-power RDS down with a non-PFAS Ultra-Dry Down treatment. The Free-Flow Zip system provides ventilation at the side, shoulder, and footbox. Technical hood, draft collar, and anatomical footbox ensure warmth retention. The highly breathable 10D shell and liner enhance comfort across a range of temperatures.