I love these shoes but I recently had my feet analyzed at marathon sports and discovered that they are actually an entire shoe size too small for me. I will absolutely be repurchasing in the right size. I’ve probably only run about 20 miles in them. Hand washed and sanitized. The women's Glycerin Max optimizes airy softness and electrifying responsiveness at every point of every step. How? Two types of nitrogen-infused cushioning, seamlessly tuned into one midsole. That’s running redefined. Sustainability 66.4 % Recycled materials in the upper Best For… Road Running Protective Cushioning Effortless Transitions Innovative Design Features Tuned cushion Ultimate protection Effortless transitions SPECS Designed for Road Midsole drop 6mm Weight 9.5oz / 269.3g Feel under foot Plush Experience luxuriously soft landings with powerful toe-offs.