Nike NP DF WARM TGHT men's leggings are made of a soft French terry fabric which will keep you warm even in the winter. They're flexible in all the right places so you can easily do lunges and squats as usual. The Dri-FIT technology wicks sweat away from the skin to the surface of the fabric, where it evaporates quickly so you stay dry and comfortable throughout your workout. The right side pocket is big enough to hold your phone.