Synthetic and textile upper. Velcro strap adjustable closure. Rock climbing bungee. Textured eva footbed. Merrell air cushion in the heel absorbs shock and adds stability. M selectTM cush outsole ultra lightweight technology balances durability and flexibility for all day comfort. Weight: 3.8 oz / 216g. Pack light. Live big. Sunstone strap is ready, willing, and able. Ultra-lightweight construction means less to bring along. Strap upper provides freedom of movement, breathability, and easy on and off.