Rolls are made of hospital-grade, 100% cotton backcloth High tensile strength, excellent tackiness, and conformability 100% cotton, zinc oxide athletic tape Consistent unwinding to the core Colorfast dyes will not bleed Details The MuellerMTape is easy to tear and unwinds to the core for easy use and great support Top-quality athletic tape for all sports medicine applications Rolls are made of hospital-grade, 100% cotton backcloth High tensile strength, excellent tackiness, and conformability 100% cotton, zinc oxide athletic tape Consistent unwinding to the core Colorfast dyes will not bleed