This strap is the secondary means of retention, and connects the Heel Captivator around the pastern of the horse. Apply with a minimum of 2 fingers width gap between the horse's pastern and the strap. Neoprene cushion is included and incorporated as part of the strap. Includes rubber keeper loops.For best longevity and durability of the hook and loop material, keep clean, free of debris, and in good condition, and wash frequently after use. Pastern Strap Size Boot Size Strap Length (unfolded) Small Classic 00 (or boots with Classic narrow captivators) 17" Small (Viper) Viper 120x110, 125x115 (or boots with Viper 'B' captivators) 18" Medium Classic 0, 1, 2 18" Viper 125x120, 125x125, 130x120, 130x130, 135x125, 135x130 18" Large Classic 2w, 2WW 20.5" Viper 135x135, 140x130, 140x135, 140x140, 145x135, 145x145, 150x150 20.5" X-Large Classic 4WW 22"
