From Blue Force Gear:
"The UDC Padded Bungee Sling is a dedicated single-point sling that is both fast and comfortable. The UDC Sling has 2" inline padding, similar to the Padded Vickers Slings for extra comfort that ends in two sections of bungee. The bungee has a travel of approximately 2" - enough to absorb shock from movement or transitions but short enough to reduce the risk of facial injuries or sagging weapons. The overall length is adjustable, ambidextrous, and compatible with use over body armor."