Mud, dirt, grass, water ? Bring it on! Caleb can handle anything your little boy can get into. This design is machine washable, water-safe and features the flex fit system ?.All natural leather upper and liningall natural rubber soleshoe features toe caps and velcro strapsmachine washablemade with eco-friendly materialsfeatures the flex fit system ? That allows you to adjust the fit of the shoeapproved by the american podiatric medical association for promoting healthy foot developmentview all pediped shoes here.