100% Viscose Derived from Bamboo 2-Pack Fitted Crib Sheets - Each set comes with 2 Isla Fitted Crib Sheets, that fits standard nursery, baby, and toddler crib mattresses sized at 52 x 28 and height of 3 to 8 . Soft & Breathable - Made of 100% viscose derived from bamboo, its breathability allows maximum comfort for your baby or toddler during nap time and bedtime. The natural material is also suitable for all skin types including sensitive and delicate skin. Easy To Put On - Our KeaBabies Isla Fitted Crib Sheet uses SnugFit Tech, a smart fabric knit that allows the fabric to stretch when you are fitting the bed sheet onto the crib mattress, for easy fitting and removal of the crib sheet. No more struggling with rigid fabric. High Quality Elastic Band - In the process of designing our Isla Baby Crib Sheet, we use high quality elastic band, which is hidden under the seams and intricately stitched to secure it in place, making our crib mattress sheets durable and long lasting.