100% Waterproof Protection: This Lane Linen Cotton Terry Breathable & Noiseless waterproof mattress protector provides complete protection for your twin size mattress from spills, stains, and accidents. Deep Pocket Design: Our white twin size measures 39x75 inches. 2 covers in one package are more convenient for you to change and wash anytime you need. Deep pocket with a fitted style design guarantees the mattress cover can stretch up to 20 Inches. It fits most types of mattresses. No matter how you move, the mattress cover can hold the mattress firmly. Breathable and Noiseless: The terry cloth cotton fabric used in this twin mattress cover is breathable, noiseless and won’t disrupt your sleep, making it the perfect choice for kids and adults alike.