Lowe Alpine's Ultralite Spider Compression Sacs have a drawcord closure and an end cap that can be compressed using the four cords.
Lowe Alpine says:Round base nylon Cordura stuffsack with 4 compression cords to minimise pack size when weight matters.
The Cordura nylon is waterproof but the seams aren't taped - so its not a Drybag. But it will minimise the volume of articles such as sleeping bag and clothing when packing is at a premium.
- Reviewed by Ultralight Outdoor Gear