From ECCO, the Men's Gruuv Studio Derby Oxfords feature: Crafted from premium ECCO Leather Removable dual-fit insoles allows for a customisable width Soft, ultra-light PHORENE™ midsole for bounce and energy return Dynamic flex rubber sole that provides you grip and flexible use of your foot Cushioning and flexibility with ECCO FLUIDFORM™ Direct Comfort Technology High grip with the rubber outsole Imported