Flowy Racerback by Cloya Activewear Relaxed Fit - Flowy Lightweight, 3.7 OZ - Tagless Burnout Fabric or Triblend Fabric BURNOUT : 60% Cotton 40% Polyester. TRIBLEND: 50% Polyester 25% Cotton 25% Rayon Tops are available in Trebled or Burnout Fabric, Both are CLOYA brand and have the same fit.