Warmalite technology recycles body heat, creating an insulating warm layer between body and garment. -Soft touch brushed polyester fabric provides superior comfort. -Branded waistband delivers better fit. -Ankle zips help you put on and take off the tights. -BlindStitch construction provides flat seams for anti-abrasion and enhanced comfort. -Back zip pocket for secure storage. -Reflective details for better visibility during night run. -Interior drawcord for secure fit during run.