Thinline Jumping Open Front Air Shock Horse Boots The Interior is Lined with ThinLine. The trademark open cell technology delivers impact protection in a wafer-thin breathable foam. ThinLine doesn’t compress. Pressure points; created from tendons, bones, splints or wind puffs, are gently shaped into the ThinLine memory, which rebounds once it is off the horse. Also, an anti-microbial agent is infused into ThinLine, allowing use on multiple horses. Finally, ThinLine foam does not absorb water or collect dirt, which means boots stay in place, are easy to maintain and provide hassle-free protection. One Size only. Due to its flexibility, one size fits most horses. Front Boots: 9.5″, 24.13cm tall, circumference 10.5″, 26.67cm. Sold in pairs-Black with silver Tack Care Instructions ThinLine Tack is extremely easy to take care of. We do strongly recommend using their all-natural ThinLine Cleaners when wiping down and cleaning your ThinLine Tack. It works great for our reins, boots, girths and more. Using baby wipes or a little simple dish soap works well for quick cleans up too. To ensure the longevity of your ThinLine Tack. It is important to keep it away from chemicals such as Show Sheen, Fly Sprays, Leather Oils, etc. This can cause the ThinLine foam to harden. Be certain to clean thoroughly if they come in contact. If you are conditioning a leather portion of ThinLine Tack, we recommend using a paste-like style to control the application.