NHL Boston Bruins MENS Sleepwear Fall / Winter Pajama Pants 100% authentic NHL merchandise, satisfaction guaranteed. EXCELLENT FABRIC: 60% cotton, 40% polyester; High quality machine washable material. Team logo embroidered on left leg for a sporty look. Two hand pockets for storage; Fabric covered elastic waistband with drawstrings for added comfort. Relaxed styling provides a comfortable and casual fit; Functional button fly for convenience.