Nike's dunk SB shoes were designed to cater to the specific requirements of skateboarders. Skateboarders were already using the immensely popular Nike dunks because of their low profile sole and light weight but when Nike released the first shoe designed especially for skateboarding (the Nike dunk SB) it was an instant success. The Nike dunk SB has extra padding, and has a characteristically 'puffy' tongue which has became a perquisite for all skateboarding shoes in the US. In fact, many Nike dunk SB shoes have become collector's items and Nike is actively collaborating with designers to release limited edition or collector's editions for their Nike dunk SB shoes.