Why is the Diablo Dos one of our all-time best-sellers? Maybe it’s the tension-loaded, Hypervent™ suspension. Or the non-chafing, seamless shoulder straps. It could be that we vented every part of this pack that contacts your body, to reduce your core temperature. Really, the whole thing is a mystery. Oh, did we mention the Diablo Dos has the highest strength-to-weight ratio of any hunting pack on the market? Maybe it’s so popular because it’s just one hell of a pack. The devil's in the details, and the Diablo Dos is full of them.