NHL Boston Bruins MENS Polar Fleece Sleepwear / Pajama Pants 100% authentic NHL merchandise, satisfaction guaranteed. EXCELLENT FABRIC: 100% polar fleece micro-polyester; High quality machine washable material. Team logo printed allover the pants for a sporty look. Two hand pockets for storage; Fabric covered elastic waistband with inner drawstrings provide comfortable support. Relaxed styling provides a comfortable and casual fit; Functional open fly for convenience.