Professionals Choice VenTECH Slide-Tec Skid BootsExtend Low Limestone Based Neoprene Conforms to your Horse Padded Leather Patch on Inside Hook Fasteners Adjust to Fit Any Horse SKBV500 Equipped with VenTECH technology. Boots extend lower to cover the pastern and bulb of the horses heel keeping dirt from penetrating the boot and causing burns during sliding stops or tight turns. Ventilated limestone based neoprene conforms to your horse, allows heat and moisture to escape and keeps your horse cool,