DOCO® Athletica Air Step-In Harness (DCA202) Hi-Density quality air mesh fabric Breathable and SUPER LIGHT WEIGHT  Dual Layered mesh for higher tensile strength Reflective piping thread stitch throughout the collar for the nighttime safety Heavy duty D-Ring for leash and ID tag Durable plastic buckle on the top for easy on and easy off Tri-glide for easy size adjustment   Vibrant colors are easy to see at all times! Size Chart DOCO® Athletica Air Step-In Harness (DCA202) Hi-Density quality air mesh fabric Breathable and SUPER LIGHT WEIGHT  Dual Layered mesh for higher tensile strength Reflective piping thread stitch throughout the collar for the nighttime safety Heavy duty D-Ring for leash and ID tag Durable plastic buckle on the top for easy on and easy off Tri-glide for easy size adjustment   Vibrant colors are easy to see at all times! Size Chart