All Day Cycling Shorts deliver 6 hours of comfort. Made in the USA. Knitted in a tricot warp knit that endures abrasion like a champ. Power-band leg grippers. 3M Scotchlite reflective pockets for visibility. Special mesh on side pockets to store items on and off the bike. Designed and made in Pittsburgh, PA. High density chamois is 40-80 kg/m3. This is the latest update to our Top Shelf cycling shorts. This is a high end, long distance cycling short from the designers and engineers who work at Aero Tech Designs. This men's cycling short is made of the proven and tested spandex fabric we have been using for many years. Ideal for avid cyclists who need muscle support for intense cycling. The shorts have a light compression to compress muscles for a light massaging support. The fabric is a blend of stretch nylon and spandex yarns that help the moving muscles and reduce movement from vibrations. The spandex fabric is a tireless workhorse for those who ride long distances often. The fabric we use in our All Day cycling shorts was tested on our Martindale Abrasion Tester and it passes the test perfectly. The fabric is rugged and stretches in all directions yet is soft to the touch. The leg bands on this cycling short are soft and comfortable. They are highly functional to keep the shorts in place. The leg band is a two part spandex fabric with a light silicone gel on the inside to help keep the legs in place for long, all day rides. The waist is a one inch elastic that is firm enough to keep the shorts in place but never feels binding. It is coverstitched flat for softness next to the skin. The seams are flatlocked for maximum stretch. The hems of the legs are sewn with a three step zig zag that feels so soft like it is invisible. BIG Sizes are available in a separate Amazon listing.