Women's trousers made of Nylon. The Atenea model is a summer style with breathable mesh on both front and back sides of the legs. At the bottom of the legs there is a zip which allows us to open and widen the leg almost twice their original size, it also has a velcro strap to adjust it to the size you wish. They have reflectors on both sides and knees, but besides that, you will see that these trousers are very flexible, as we have fitted an elastic fabric on the back of the knee to make the flexing much more comfortable. Finally, inform you that it also has a waterproof membrane that can be removed or attached at any time.