Ektelon Men's NFS Attack White/Black/Red Synthethic Mid Racquetball Shoes 12 D(M) US synthethic Upper: Lightweight synthetic overlays provides comfort and lasting support. Midsole: Molded EVA midsole provides durable cushioning. Tacky gum rubber outsoles for ultimate traction. PU sockliner provides added cushioning and long lasting support. ShockEraser midsole insert absorbs heavyimpact in the heel.