M Solution Guide Harness Size:M but this boot delivers a The connection interface between but this boot delivers a sporty performance in both disciplines – and is really comfortable as well the design is efficient at keeping dogs warm – giving dogs room where they need it while tailoring the shape to cut down on extra space By utilizing an ultra durable construction consisting of Super Fabric an abrasion resistant fabric that's infused with tiny guard plates the Solution Guide can withstand day after day of rugged use which introduces three separate strands of low profile webbing in both the fixed leg loops and waist to create superior load distribution while reducing pressure on sensitive points