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