The Puma Ignite Sock features ignite foam for superior cushioning and exceptional responsiveness to help make you go faster, whilst the unique PU foam formula offers high rebound and the ultimate in cushioning comfort where you need it the most. ForEverFoam technology is integrated in the heel to provide durability for long-lasting performance. Featuring a mono sock upper and integrated tongue for superior sock like comfort whether youre in the gym or pounding down those country lanes. - Synthetic / Textile Mix - Lace closure for a secure fit - Mono sock inner for a sock like fit and feel - Ignite bounce back foam midsole - Forefoot flex grooved outsole - Silicone heel cradle for locked in fit - Puma branding throughout