Abstract: A horseshoe made of resilient material having a low modulus of elasticity, low density and an allowable working stress in the range of 15,000 to 22,000 PSI. The configuration of the spring, in combination with these properties, provides a working deflection in the range of 0.3 to 0.5 of an inch under a load of 2000 pounds, i.e. a spring rate of 5000 pounds per inch, and weighing in the range of 8 to 10 ounces. The purpose of the resilience is to relieve shock loads in horses' hooves and, on a corollary basis, improve the performance of the horse. The horseshoe is a single piece having a horseshoe shaped flange to be attached to the horse's hoof, a second horseshoe shaped flange which contacts the terrain and a curved channel interconnecting the two flanges, spaced apart and parallel to each other. Protrusions on the flanges limit deflection of the flanges toward each other to keep the stresses in the spring well within the allowable range.