All-in-One Solution for Impact, Protection and Support; VenTECH neoprene, UltraShock lining + Brrr cooling minerals, and the revolutionary STRIKE Shell are all wrapped up into one boot; 4-way stretch of Professional's Choice's signature VenTECH neoprene offers excellent support and allows natural range of motion; Extra wide, darted suspensory strap stretches and supports with each stride, helping to eliminate hyperextension of the fetlock; STRIKE Shell, made from high-quality shatterproof TPU, provides an optimum shield from interference and coverage over the fetlock and tendons resulting in complete protection; Brrr performance textile, which rests against your horse's leg, instantly cools and continuously wicks away sweat and moisture, keeping legs both cool and dry; Value 4-Pack (Front and Hind Boots)