This is Beau working off the boat in his. I am just using it as a working harness, not for carrying loads because I really liked the more rearward position of the D ring on a long backed dog and the heavier webbing if I needed to lift him (I got load rated plastic cobra buckles added and I like how easy there are to manipulate). The mesh is pretty heavy duty-I have other working gear from that mesh that has never torn. I cannot answer on the chest size but will go snag mine this evening and let you know. Beau is not nearly that big.