Pull apart the hood-and-loop fastener and position the wrap under your dog's belly. The adjustable elastic band should be toward your dog's head.Pull the straps around your dog, feeding the narrow strap through the buckle. Pull the strap down and secure the hook-and-loop fastener. Make sure the fit is snug, but not tight. Center the underside of the wrap, making sure his genitals are completely covered.Fine-tune the fit using the adjustable elastic band. Secure the excess elastic by folding the strip over and buttoning.To launder the wrap, secure the adjustable elastic bands and hook-and-loop fasteners. Wash the wrap separately in warm water on the gentle cycle and line dry.