Think of this modern slim with room to move as not-so-skinny skinny jeans. . (If you want the style, but not the feeling, this is a great alternative) With a streamlined fit that’s narrow through the seat and thigh, the 511 Slim is perfectly calibrated to look good with everything-without looking like you’re trying too hard. How are they so comfortable? Stretch denim, made with sustainable Tencel Lyocell fibers. - Stretch: Levis Flex. - Leg opening: Slim. - Front fly opening: Zip. Materials. - Fabric type: Denim. - Fabric detail: 70% Cotton, 28% Lyocell(Lenzing Tencel), 2% Elastane(Lycra)