Crafted with highly comfortable and flexible stretch material, allows these shoes to conform to the shape and width of your foot. Hey Dude uses 4-way stretch material that allows the unique shape of your foot to match the upper of your Hey Dude shoes. A variety of upper materials allow for year-round wear. The last shape, combined with our Flex & Fold sole system make it the lightest, most comfortable shoe on the market today. Wally 's low-top, chukka-style forefoot vamp is wide, allowing total circulation of the toe area, and a slightly lower instep arrests the foot preventing slippage. The heel pocket is anatomically correct, creating a superb feel even with custom orthotics. SHOE SPECS: Sizing Tip: If you usually wear half sizes, we suggest choosing the next size up for best fit Flex & Fold Technology Ultra-Light outsole 2 lacing options Stretch upper Soft oxford cloth lining Memory foam insole Machine washable (cold)