Rubber soleMEMORY FOAM INSOLE. High quality memory foam insole could effectively relieve your foot fatigueLIGHTWEIGHT AND ANTI-SKID SOLE. Indoor and outdoor use, easy to carry and perfect for travel, home etc.T-SHIRT TYPE OF MATERIAL. Ultra soft and breathable cotton materials, give you a unique experience.WEARING WITHOUT YOUR SOCKS. These will keep you feet comfortable any season, without being too warm in the summer.MACHINE WASHABLE. Easy maintenance, machine washable.