Arcopedico ESElastic goring allows ease when slipping on and off the ES. The nylon knit upper is machine washable, lightweight, and breathable. Remove the insole and air dry. A slip on version of Arcopedico's best selling shoe, the LS. The ES features a blend of techno elastic upper technology with the use of a special knitted nylon fibers that provides a controlled freedom of your foot shape. Lined with a soft interior for barefoot wear and built in SanSmell