Zoot Men's Ultra Megaheat Tights Body: 275g MEGAheat - 80% nylon 20% spandex Inset: 250g MEGAheat - 93% polyester 7% spandex Imported MEGA heat fabric with 20% spandex provides superior muscle support and ensures warmth Hip Holster pocket with bonus secured zipper pocket 7" leg zippers with reflective trim for maximum safety