Polyester 【TODDLER BEDDING SHEET】:UOMNY crib sheet is made of soft microfiber. Besides our shark crib sheets with a smooth surface and comfortable touch.Your little one will fall in love with this comfortable and soft shark fitted sheet which makes him easier to fall asleep. 【CRIB SHEET BOYS WRAP IN 360 DEGREE】:The fitted crib sheet dimension 28 x 52 x 8 inches for standard crib and toddler mattresses.The toddler bed sheet will wrap your baby's mattress in 360 degree，which can make it solid non-slip and be suitable for all kinds of baby sleeping positions. Fits all standard Crib Mattresses and Toddler Bed Mattresses. 【FITTED CRIB SHEET】: Shark Crib Sheet for Boys Girls 1 pack unisex nursery sheet is a perfect baby shower gift, the best Christmas present for baby girls or boys. Complement on any nursery design. 【WASHING CARE INSTRUCTIONS】:Don't worry about the fading colour of the fitted sheet.The soaking time shall not exceed 30 minutes, and the washing water temperature shall be lower than 30 ℃. Please be careful not to let the sheet direct contact with undiluted detergent; try to avoid sun exposure, you can dry it on the reversed. 【TODDLER SHEET WARRANTY】: 100% SATISFACTION GUARANTEE: We are so confident in our fitted crib sheets that we offer a 30-day satisfaction guarantee! If you find the sheets have any quality problem, simply contact us and we will solve your problem. UOMNY fitted Shark Crib Sheets for Boys is a perfect baby shower gift or Christmas present for baby girls or boys.UOMNY fitted Crib Sheet 28'' x 52'' for Standard Crib and Toddler Mattresses.