I have only used these 4 times. Just not the right fit. Super bummed because they have incredible reviews. Can’t return them. FEATURES & BENEFITS A reimaged S-curved winged nylon plate for added support for faster efforts Ultra-light PWRRUNPB foam cushioning for increased bounce and efficiency when speed and performance are paramount SPEEDROLL Technology encourages a smoother and easier run by helping you roll from heel to toe with less effort . so can run faster, not harder FORMFIT design hugs every part of your foot while allowing full natural movement for a personalized fit XT-900 rubber for durability and traction, gripping the road to keep you moving forward Suitable for faster running, racing, and every day running SPECS Sustainability: This style is vegan and contains recycled materials Category: Neutral Heel-to-toe Offset: 8mm (36mm heel/28mm forefoot) Weight: Women’s 7.2 oz (204g)