This Two-piece set by Polo Ralph Lauren is a comfy sleep set with timeless style. The short sleeve T-Shirt is made of soft poly jersey knit fabric, features a jumbo Pony and has a tagless rib knit neckline for easy, comfy wear. The matching shorts are made of woven poly twill finished with an allover Pony print and have an elastic waistband featuring jacquard logo detailing.