Red Dingo Dog Harness Medium neck circumference : 13,7 - 20,8 in (35-53 cm) chest circumference : 15,7 - 21,6 in (40-55 cm) Red Dingo dog harness Webbing - Premium nylon webbing, woven from quality fine yarn for a softer feel. Densely woven edges for maximum abrasion resistance. Exceeds ISO standards for washing and UV colour fastness. D-Rings - Fully welded from solid stainless steel. D-rings will not rust and therefore will not discolour pet"s fur. Bucklebone - An original Red Dingo trademark and registered design. "Bucklebones" are designed not only to look good, but to be amongst the strongest side release buckles used in the pet industry.