
My daughter has an old Land's End backpack and it doesn't have a chest strap. The backpack has an elastic band sewn to the shoulder straps. I use these elastic straps to keep the XTACER chest strap in place so it doesn't slip down. The straps are strong. There are no instructions, but since I have an Osprey hiking bag, I'll use it as a guide. It's very simple, but a manual makes the guessing game obsolete. The end of the strap wears out as I put them together. When I was done I simply used a lighter and burned the ends of the straps to prevent further fraying. Generally good products.

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