97% Rayon made from Bamboo, 3% Spandex 28 in x 52 in Our beloved bamboo rayon is now available as a crib sheet! Your precious baby will love bedtime with these luxuriously silky sheets to rest their head upon. The gentle fabric stretches over a standard crib mattress for a snug fit, keeping your baby safe while they sleep. & 2025 Penguin Random House LLC. All rights reserved.