Smooth PU Upper that provides durability and comfort. Padded collar and tongue for comfort and foot security. Rubber Sole for extra grip and durability. ABEC 5 Wheel bearings and Low-Profile Rubber Wheels for the Perfect Roll. Throwing it back Y2K style with this new Rezerve design! PU upper; padded tongue and collar for optimal comfort and protection. Full lace closure. Durable rubber sole with abrasion resistant brake pad. Low Profile Wheels. ABEC 5 Bearings.