Cool-jams versatile wicking 3-piece pajama set with long pant bottoms, tank top and long sleeve button front top is perfect for travel or temperature regulation. On those chilly nights wear the long sleeve top and when you start getting warm, you'll have the tank top underneath. Our quick drying, silky soft moisture wicking smart fabric wicks away moisture to provide stylish relief for warm nights and is great for travel and body temperature regulation. Cool-jams fabric has a super soft cotton like feel with wicking ability that never washes out. In fact, the wicking action is scientifically woven into the fabric itself. Note on size chart: The most important measurements to use are hip and bust. Relaxed elastic waistbands accommodate up to 6" larger waist size.