The ASICS 33-FA is designed for runners seeking a more natural running experience with a cushioned ride, using its Natural33 last for anatomical comfort. Seamless construction for a slipper-like fit and feel. ComforDry™ Sockliner for cushioning and a drier, cooler, healthier environment with antimicrobial properties. Lightweight Solyte® midsole for cushioning and improved durability. FluidAxis anatomically correct deep flex grooves are aligned to your foot's joints for adaptive load and positional change on every step. 4mm drop. DuraSponge® blown AHAR (ASICS® High Abrasion Rubber) outsole for enhanced cushioning and durability. International Shipping is not available. 7.5 oz.