The Waterproof GORE-TEX© Bivy Cover is produced utilizing waterproof, moisture-vapor-permeable material with all seams heat sealed. A component of the Military Modular Sleep System, the Bivy is designed to cover the Patrol and Intermediate Cold Weather sleeping bags and fit into the compression stuff sack. 81-83″ Long, 34-36″ Wide (top) 27-29″ Wide (foot) Less than 3 pounds