This Alps Mountaineering Cyclone compression sack helps fit large sleeping bags into small spaces. These cylindrical sacks are well-suited to being strapped on the outside of a pack, yet also fit nicely inside your pack. Constructed of tough nylon fabric with strong 3/4 webbing straps bottom handle for easy carrying. Three straps wrap around the circumference of the sack to reduce the diameter one strap runs lengthwise to shorten the sack. Durable to withstand lots of backcountry use. Closeout.