The new FAAS 500 S v2 features PUMA's innovative FAAS Engineered Stability Zone technology on the medial midsole and the outsole, delivering a more stable ride without the addition of TPU or a second density medial post. Stability is engineered into the midsole without added weight, guiding your foot and encouraging neutral running. The shoe has a 4mm heel-to-toe drop, and is built for the runner who is looking for a lightweight running shoe for midfoot striking.