【Toe&Heel cushion】Extra reinforced heel and toe for added comfort and arch support to reduce foot fatigue. 【Dynamic arch design】Dynamic arch support helps reduce foot fatigue. 【WANDER Block technology】Anti-odor technology helps prevent odor in the sock. 【Keep feet dry】WANDER Dry material wicks moisture, accelerates evaporation. 【After Sales Service】WANDER provides 2 years of after-sale production service.If any problem, please contact us by Amazon message&we shall refund or send you a replacement until you satisfied totally.