They have been designed to comply with BS and International rules for 'Young Horse' categories, Second rounds, Finals and Pony Classes where our standard fetlock boots may not be suitable.The interior length on both medium and large size boots does not exceed 16cm which makes them BS and International rules compatible - Updated 20th May 2019.Made to the highest standard using innovative technology and materials. A double density shell provides outer protection whilst underneath this, layers of Kevlar and shockproof materials work together to minimise the effects of knocks or strikes. A Flex-Tech zone has been incorporated for unrestricted movement & a double locking Velcro fastening is finished with strong microfibre leather.Engineered with Air-Tech ventilated neoprene on the inside to help prevent heat build-up in your horse's legs. Combined with the silicone air vents on the exterior for maximum breathability. Lined with comfort dry lining (CDL) these boots are comfortable, practical and strong. These fetlock boots are perfect for use whilst show jumping and look great with our Kevlar Airtechnology Tendon Boots.Your Kevlar Airtechnology Lite Fetlock Boots has been carefully hand packaged in a complimentary, reusable zip-fastened storage bag to keep your tack room tidy when not in use and easy for carrying.Technical Details.The interior length on both medium and large size boots does not exceed 16cm which makes them BS and International rules compatibleKevlar and shockproof protection behind a double density outer shellAnatomically shaped for comfort and ease of useAir-Tech ventilated neoprene inner layer lined with comfort dry lining (CDL)Double silicone ventilation ventsFlex Tech zone for unrestricted movementDouble locking Velcro strapsSold in pairsYour Kevlar Airtechnology Lite Fetlock Boots comes in a complimentary, reusable zip-fastened storage bag.