The Tail Boot is a strong and durable alternative to the traditional tail bag. The Tail boot is constructed of a durable neoprene shell that is waterproof. The wrap comes in many different sizes to fit all equines and it is a perfect way to wrap and protect your horses beautiful tail. Throw out those tail extensions and give The Tail Boot a try! To determine sizing watch the video below to learn how to measure. If you ever have any questions do not hesitate to email us at firstname.lastname@example.org. Sizing is based mostly off of the thickness, however if you have a horse with an extremely long tail their sizing may be different. It is always best to measure and see what size would be best for your horse.