This is no ordinary stuff sack. The Zenbivy Dry Sack features fully-welded seams for a watertight seal you can trust, instant compression through its high-speed mechanical valve, and durable yet lightweight construction. Our Dry Sacks are compression compatible, not all-in-one, which means you get to choose — leave it stuffed as-is or add on our Compression Caps to get an even smaller, more compact bundle for packing.