ASICS Men's GEL-Solution Slam 3 Tennis Shoe 100% Synthetic Imported Rubber sole AHAR: Acronym for ASICS High Abrasion Rubber. Placed in critical areas of the outsole for exceptional durability. Forefoot GEL Cushioning System Enhances shock attenuation during propulsion. SpEVA Midsole: Material Improves bounce-back characteristics and decreases midsole breakdown. Synthetic Leather Upper Truss tic System: Reduces the weight of the sole unit while retaining the structural integrity of the shoe.