DURABILITY MEETS FLEXIBILITY. The Nike SB Delta Force Vulc is built to skate all day. Soft foam cushions every step, push and drop, while perforations on the sides help keep your feet cool through long sessions. Benefits * Suede and synthetic leather are plush and durable. * Mesh tongue and perforated sides add breathability. * Foam insole cushions every step. * Vulcanised construction fuses the sole to the upper for a flexible feel.