A Soft and Breathable, Lightweight Layer Ely's & Co.'s Jersey Knit Crib Sheets are made of 100% High Quality Combed Jersey Knit Cotton fibers. Our t-shirt soft sheets are breathable, lightweight and feel great against your baby�s sensitive skin. Complemented by delicate and soothing design, these sheets create a warm, and welcoming sleeping environment for baby. Unlike woven cotton, jersey knit fabric is naturally stretchy and wrinkle-free which makes for easy care. Snug and Secure Safety Like all Ely's & Co.'s products, our Crib Sheets are designed with your little one�s safety in mind. We understand the importance of safeguarding your baby�s sleep environment against potentially hazardous situations due to poor fitting bedding. A double reinforced 1.5 cm thick elastic band along the entire bottom edge of our sheets ensures a snug fit that helps to prevent sheets from bunching, sliding, shifting, and pulling up over mattress corners.