THE NEXT GENERATION OF CHRON. Flexible and breathable, the Nike SB Chron 2 is a sequel worthy of its predecessor. The revamped design includes a reshaped collar and heel for an improved fit-all while maintaining the comfort and performance you expect from Nike SB. Benefits - Suede and canvas are durable and breathable. Foam cushions every step. Vulcanized construction fuses the sole to the upper for a flexible feel. Extended toe bumper adds durability.