Long sleeves, button-down pajama top. Comfortable waist band Straight legs. This product has 65 Polyester 35 Viscose at the top and 100 Cotton fabric at the bottom. Thessaloniki shirt black bottom interlock men's pajamas set is the perfect choice for a comfortable sleep. It offers a healthy wearing comfort thanks to its cotton bottoms. The comfortable waistband fits your body. It fits perfectly and it doesn't make you uncomfortable. Polyester is a flowy and light fabric that's durable and flexible. It's shiny. Viscose is made of beech wood. Like cotton, it's made of cellulose. It's sweat-proof and it's breathable. It keeps the colors vibrant. Cotton is a natural fiber Made from pure cellulose. Cellulose is an organic substance created by synthesis in nature. It has low elasticity. Care Instructions Wash at max. 30°C. Do not tumble dry. Do not bleach.