Nike pro hyperwarm aop tights junior boys the kids nike pro hyperwarm aop tights have been constructed with a stretchy compression fabric which benefits from hyper warm technology that helps to trap body heat close to the skin to keep you even warmer on the cold training days these nike base layer tights also feature flat lock seams and a wide elasticated waistband for a comfortable fit completed with printed panels to the legs and the nike swoosh kids base layer tights wide elastic