If you want to compress your gear and keep it dry for your cycling, hiking, or kayaking adventure, the Evac Lightweight Compression Dry Bag from Sea to Summit is the perfect solution. The bags come in various sizes and can hold items like spare clothes or your sleeping bag. The advantage over regular stuff sacks is that the Evac Lightweight Compression Dry Bag keeps its contents truly dry, thanks to the waterproof outer material with C0 treatment, the roll-top closure, and the sealed seams. It can be packed compactly into your backpack or bike bag. The durable 70D floor material with PU coating is waterproof but allows air to pass through. When compressing, you can simply push the air out without needing to operate an extra vent. The compression straps make it easy to evenly compress soft items.