Nook Crib Sheets offer a natural and breathable alternative to standard infant bedding. Nook added oxygen to the blend of soft, silky eucalyptus and certified organic cotton, eliminating any dirt and residue that clog natural fiber airways. This process of oxygenation, coupled with low-impact dyes, preserves airflow through the fabric. Mix-and-match the bright patterns of Nook Fitted Crib Sheets for a more breathable, non-toxic and beautiful crib. 28" x 53" x 8."