NHL Boys Calgary Flames Cotton Sleepwear / Pajama Pants 18M Red & Black 100% Authentic NHL merchandise, satisfaction guaranteed. Extremely high quality fabric: 52% cotton, 48% polyester; Machine washable Fabric covered elastic waistband for added comfort. Team logo printed allover the pant for a sporty look. Legs with rib-knit cuffs snug up the fit and extend for longer wear.