The cut: Roomier in the seat and thigh with a slightly tapered leg for a muscle-friendly fit (and they show up pre-cuffed). The fabric: Premium Authentic Flex selvedge denim from Japan combines a rigid look with all the comfort of stretch. Style Name: Madewell Selvedge Athletic Slim Authentic Flex Jeans (Northfleet Wash). Style Number: 6155668. Available in stores.