Cool-jams moisture wicking men"s 2 piece boxer pajama set features elastic waist pajama bottoms and a pullover v-neck t-shirt top. Our men"s pajama is great for travel and will keep you cool, dry and comfortable all night. Our quick drying, super soft moisture wicking smart fabric wicks away moisture to provide comfort all night. The fabric will actually keep you cool when you"re warm and warm when temperatures dip. Our Cool-jams fabric has a soft cotton like feel with wicking ability that never washes out. In fact, the wicking action is scientifically woven into the fabric itself.Please review the men"s pajama measurements below to determine your correct size.How to find your correct size? It"s simple. First, take your hip and chest measurements, then add 3-6" to each measurement depending on how you like your sleepwear to fit. For a snug fit add 2-3". For a loose fit add 4-6". Then compare your measurements to the garment measurement chart below to find your correct size. Please note that the elastic waist can stretch up to 8 additional inches.Garment Measurements: M L XL XXLChest 48" 51" 51" 54"Front Rise 13" 14" 14" 15"Back Rise 19" 20" 20" 21"Elastic Waist (relaxed) 31" 34" 36" 38.5"Low Hip 47" 50" 52" 54.5"Boxer Length (outside seam) 19" 19" 20" 21"