Reinforcement at heels, toes, footbeds and Achilles provides long-wearing comfort Stretch arch bands provide effective support Seamless toes prevent chafing Machine wash in cold or warm water, no bleach or fabric softener; tumble dry low Made in USA with imported and domestic yarns REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits