11 Assorted Colors Silicone Pouch Compatible with Nike+ iPod and Nike+ SportBand Nike Plus - Compatible with all Shoes Young Micro Branded Product, 100% Satifaction Guaranteed - Lifetime Warranty Compatible with Nike+ iPod or Nike+ SportBand. Attaches to any shoe with shoe lace. Made of 1mm thick silicone skin that is water proof and tear resistant. Slot opening on the back of the case to quick gain access to Nike+ Easy to install; 4 attachemnt points through any shoe with lace.