Brushing boots, also known as splint boots, are used to protect the inside of a horse's lower leg from the opposite leg or hoof brushing against or striking the leg.

Brushing injuries are commonly due to the conformation of the horse and occur mostly on horses whose hooves swing inwards although brushing injuries can also occur in young, tired, lazy horses, or from working on uneven ground and can be severe particularly if the horse is shod.

Brushing boots are mostly used during exercise, although they can also be used on horses turned out in the field, particularly if the horse is excitable, the ground uneven or slippery, etc to prevent injury.

Brushing boots are most commonly made of leather, neoprene or some other synthetic material, and have a protective padded area known as a strike pad on one side to protect the inside of the canon bone and fetlock.

Brushing boots are available in different sizes and the size chosen should be of sufficient size to cover the canon bone to the bottom of the fetlock and be fastened securely in place so as not to slip down when the horse is working. Leather brushing boots tend to have straps and buckles to fasten them, but synthetic brushing boots are usually fixed with several velcro fastenings which fasten around the horse's leg or which pass through a ring and fasten back on themselves. Some have double velcro straps that overlap and these are more secure than single velcro straps. Brushing boots with velcro fastenings make putting on and taking the boots off quick and easy, and are more adjustable than straps and buckles.

Brushing boots should have a soft lining to prevent any soreness occurring and it is important that the brushing boots fit the horse comfortably to avoid any rubbing. There are brushing boots available with fleece or skeepskin lining for extra comfort and these linings may be removable for easy cleaning. Brushing boots will inevitably get dirty and so it is important that they can be easily and regularly cleaned.