Allows the shooter to adjust the overall length of the sling for a rapid transitions from strong side to support side and back. Designed for muzzle down carry. Place the sling diagonally over your shoulder and under the opposite arm, access the free running end of the sling under your arm and easily switch to your opposite shoulder without having the sling tighten on your body. Quickly adjusts to several different shooting and carry positions. 800 pound laboratory certified tensile strength, US military application, two inch wide razor thin elastic material eliminates neck pinch and disperses the firearm weight; thereby, reducing fatigue excellent for all tactical weapons.