The Lucid Rayon from Bamboo Jersey Mattress Protector is soft, light and protects the top of your mattress from fluids, dust mites and allergens. It is protection made comfortable, with a soft, lightweight feel that does not feel bulky on your mattress. A blend of 70 percent rayon from bamboo and 30 percent cotton creates the perfect jersey fabric. In addition to being incredibly soft, the fabric is highly breathable and exceptionally good at moving moisture away from the body. This protector is designed to be lightweight and unfilled, so it does not change the feel of your mattress. Beneath the soft fabric is the STRATOSMART Barrier, a polyurethane backing that blocks all liquids with confidence, and prevents dust mites, pet dander and common allergens from reaching your mattress. Thousands of microscopic openings allow the barrier to block out the stuff you do not want on your mattress while allowing airflow for a comfortable climate. Made with a fitted sheet design, this soft, noiseless mattress protector goes on easily and is simple to remove for laundering. The knitted sidewall has an elastic around the skirt that stretches to fit thicker mattresses, including pillow top and memory foam mattresses, and has a smooth, secure fit. Mattress protector can be machine washed in warm water with mild detergent and tumble dried on low heat with other bedding. Do not iron, dry clean or use bleach or detergent with whiteners. Drying above recommended temperatures may damage waterproof barrier. This Lucid product is backed by a 15 year warranty. Sidewall: 100 percent polyester, Backing: 100 percent polyurethane Ultra Soft And Moisture Wicking Fabric Is 70 Rayon From Bamboo 30 Cotton Noiseless Breathable Stratosmart Barrier Blocks Out Liquids Dust Mites And Allergens Lightweight Fitted Sheet Style Mattress Protector Has Deep Pockets And Stretches To Fit Thick Mattresses Machine Washable And Dryer Safe On Low Heat Cal King Protector Measures 72 X 84 And Has A 15 Year Warranty Features: Breathable, Moisture Wicking, Allergen Barrier Bed Size: Twin Xl Measurements: 80 Length/Inches, 39 Width/Inches Base Material: 30% Cotton, 70% Rayon From Bamboo Care: Machine Wash, Tumble Dry Protection Level: Moderate Mattress Pads & Toppers Type: Mattress Protectors Country of Origin: Imported