NHL Boston Bruins MENS Polar Fleece Sleepwear / Pajama Pants 100% authentic NHL merchandise, satisfaction guaranteed. EXCELLENT FABRIC: 100% polar fleece micro-polyester - heavy weight, super soft and comfy fabric; Machine washable. 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.