The Nike Air Penny 5 Big Kids. And since these sneakers were made for a stellar athlete, you can bet they boast performance technology that'll keep you going from tip-off to the final buzzer. Phylon foam through the midsole adds a plush feel underfoot, while the Max Air unit in the heel ensures explosive take-offs. Leather and synthetic materials on the upper combine for total comfort and support, while the rubber sole keeps you from slipping and sliding. UPPER: Leather and synthetic materials MIDSOLE: Phylon foam, Max air unit OUTSOLE: Rubber with traction pattern.