The CRS Combat Rescue Sling aka Tactical Rescue Sling from Groves Incorporated, makers of the original Sling-Link, is used by SWAT teams and the U.S. Marine Corp. It can be used to drag or carry injured team members to safety. The rugged and reliable sling folds to fit into a pocket but holds up to 4,500 pounds when in use. The device meets NFPA and OSHA standards.