A Soft and Breathable, Lightweight Layer Ely's & Co.'s Jersey Knit Bassinet 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. 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 Bassinet Sheets are designed with your little ones safety in mind. We understand the importance of safeguarding your babys 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.