The Spark Spl is a sleeping bag designed by Sea to Summit that can keep its occupant surprisingly cozy, given how light it is.

It has a breathable, water-resistant 10D Pertex Quantum shell, a liner made from soft-yet-durable 15D nylon, and is filled with 850+ loft goose down treated with Ultra Dry-Down (a water repellant). The neatest part is that the whole thing compresses down into a pack small enough to fit in the palm of your hand.

Get one on Amazon for $394 There’s also a large version for $20 more.