The Sonar Surf is an open toe high heel gladiator bootie with a stretchy neoprene mesh upper, a velcro ankle strap, and signature pull loops. The mix of sporty materials and dressy elements offers a comfortable fit and a flattering silhouette. Size & Fit - Standard Fit. Heel Height - 90mm/3.6in. Neoprene mesh fabric and neoprene upper with nylon webbing. Neoprene fabric lining. Leather footbed. Rubber outsole