These womens pewter/oat/lilac hi-tec 29000 harmony life strap sandals have many unique features such as high performance synthetic upper, delivers breathability, durability and comfort during wear, adjustable, easy to use, buckle fastening ensures for a comfortable and secure fit, neoprene lining delivers padding and protection, for all day comfort, sculpted eva footbed/midsole delivers underfoot comfort, stability and support, rugged vibram outsole for durable traction, injection moulded eva midsoledsole for lightweight cushioning, durable carbon rubber mdt hiking outsole, microfiber footbed cover, protects and wicks any unwanted moisture from the underside of the foot,ensuring maximum comfort.