Acavallo Respira Neoprene Gel Lined Back BootsHighly breathable shin guards in perforated neoprene and gel, offering elasticity, adaptability and optimal protection to the flexor thanks to the internal gel inserts. Acavallo Respira neoprene back boots are highly breathable thanks to the use of perforated Neoprene fibers. They are characterized by a greater degree of elasticity and perfect adaptability to the horse thanks to the combination of the gel with these particular fibers of material.