ASICS GEL-Rocket? 7 indoor, squash or racquetball shoes have a lighter weight upper than on the previous version. And now, increased gum rubber on the outsole provides increased traction for better control on the court. Updated styling and design will continue to make the series a great indoor court option for recreational players.Upper: Lace-up front offers an adjustable fit. Padded tongue and heel collar enhance comfort. Mesh delivers breathable flexibility. Synthetic overlays deliver support and durability.Midsole: Trusstic System? consists of a molded component which reduces the weight of the sole unit while retaining the structural integrity of the shoe. Forefoot GEL? Cushioning System enhances shock attenuation during propulsion. Outsole: NC Rubber? Outsole compound contains more natural rubber content than traditional solid rubber, resulting in enhanced traction on court systems.