The upper uses sustainabe fabric that combines excellent water repellency and moisture permeability feature COMFORTAS®WR and ECOPET® that is made from used plastic PET bottles. The batting uses 3M TM THINSULATE TM , a high-performance batting material that helps trap body heat, while allowing moisture to escape. SHAKA IN-FOAM is used for the insole with high antibacterial and deodorant effect, breathability and high cushioning. The outsole is equipped with ALL-TERRAIN SOLE for all time comfort.