The Puma Powerwarm Long Mens Running Tight is built to battle the coldest of elements when out running. They are built with warmCELL technology that is made with highly functional and breathable materials retain heat close to your body to maintain your optimum temperature when it s cold outside. A Powerwarm strategically placed adaptive material helps you maintain an optimum body temperature with a ceramic print which retains heat next to the body. Added Mesh inserts offer improved air circulation at critical heat zones, Reflective logo details that offers enhanced visibility in low light conditions. Added articulated knees give improved flexibility and freedom of movement . Zip pocket offers additional small storage with Laminated, waterproof lining to ensure personal items stay dry. Added details include an elasticated waistband with drawcord for adjustabililty and Zippers at the bottom of the leg for easy on and off access.