It's really a shame that use of the shooting sling has almost become a lost art because it really does do wonders for accurate shooting from any field position in which the elbows are supported. The Whelen sling was designed by Mister Rifleman himself, Colonel Townsend Whelen, as the hunter's lighter, quicker, and easier alternative to the good old USGI military Model 1917 leather sling. The Whelen sling was the late, great Jack O'Connor's absolute favorite and he wrote, "Every game shot who takes his shooting seriously owes it to himself to get a good sling, then learn how to adjust it and use it." This is a stout, robust leather copy of the Whelen, built to last, and all my hunting rifles wear one. The only bad thing I can say about this product, as noted by others, is that the included instructions are pretty well worthless. But Townsend Whelen's book The American Rifle is available free on-line and the chapter entitled "Holding and Firing Positions" tells everything you need to know about the M1917 and Whelen slings and their use.