NIKE Phenom Elite Knit Pants CU5505 010 M size The Nike Phenom Elite Pants use a stretchy, lightweight material. The slim design, which tapers towards the ankles, provides a more refined fit than before. The improved woven material provides a light feel. The stretchy design supports free movement with every step. These pants incorporate heat mapping based on runner data to enhance breathability in necessary areas. Stretchy woven material and a grid face are used on the upper back, the inner leg gusset, and the back of the knees. They provide excellent breathability at all times. The lined media pocket in the center back is convenient for storing essentials. Small items can be stored in the side pockets, and keys or cards can be stored in the drop-in pocket on the right side.