Sugoi Men's RPM Bib Knicker Body: 80% Nylon 20%Spandex, Mesh:92%Polyester 8%Spandex; cool wash, no bleach, no dry, no iron, no dry clean Mobil Mesh upper bib is highly breathable, lightweight and designed to stay in place Flat seams for increased comfort 2" hem band for comfort and 8 panel contour Canada