Polyester webbing straps are soft and pliable for comfort Crossover strap design holds feet firmly to footbeds EVA topsoles and midsoles deliver cushioning and support Topsoles and midsoles feature enhanced arch structure for added comfort Lightweight EVA outsoles to offer everyday, casual-wear traction Best Use:   Casual Upper:   Polyester webbing Topsole / Midsole / Outsole:   EVA This is my second time purchasing, previously purchased these several years ago. As other reviewers have noted, the straps are all different lengths and even when sizing up they don't fit quite right, some are loose, and some are too tight. Purchase at your own risk!