PUMA Faas 600 S Women's Running Shoes External Heel Counter - Delivers a snug fit and comfort, with enhanced support and stability. Moulded High-Rebound OrthoLite Sockliner - Provides additional comfort and enhanced fitting. FAAS Foam+ - PUMA's proprietary blend of foam and rubber which is more resilient, responsive and comfortable - in a 25% lighter format. Forefoot Flex Grooves - Greater flexibility gives you the opportunity to toe-off easier and helps to smoothen out transitions. Lateral Release Groove - Slows the rate of pronation and offers a smoother ride through the entire gait cycle.