Vanguard Endeavor 301B Rubber Integrated Sling - Black - The Endeavor Sling 301B is a gun sling that's all about security and comfort. It features a thick rubber armor to distribute weight evenly and effectively on your shoulder and provide a secure grip. A thumb loop reduces muscle fatigue, and its innovative rubber spring system prevents slipping and bouncing. High-Density Rubber Armored Strap Durable, Lightweight, Anti-Slip, Anti-Scratch, And All-Weatherproof Thumb Loop For Easy Transport Quick-Action Ladder-Lock Buckle To Adjust Sling Length Up To 45.25in Z-Style Construction Allows For Maximum Grip And Flexibility Rust-Resistant Quick-Detach/Attach Swivel Hardware Included