The Ruffwear Web Master Harness is a supportive, multi-use harness built for manoeuvring and assisting dogs up and over obstacles as well as for designating working dogs. Thin, durable foam provides support without hindering range of motion and a platform for attaching patches and signage for working dogs. Five points of adjustment create a secure fit, while padded chest and belly straps make the Web Master comfortable for all-day wear. The preferred harness of many avalanche rescue dog programs, service dog handlers, and amputee dogs, the Web Master is a great collar alternative and ideal for hiking, scrambling, and mobility assistance. The Web Master is available in five sizes. Select the correct size based on your dog's girth (measurement around the widest part of the rib cage). XX-Small: 33-43 cm (13-17 in); X-Small: 43-56 cm (17-22 in); Small: 56-69 cm (22-27 in); Medium: 69-81 cm (27-32 in); Large/X-Large: 81-107 cm (32-42 in). For in-between sizes, choose the smaller size. Washing Instructions: Secure the fasteners; hand wash with mild detergent; air dry.