Features Precision-Fit corners and a 1″ elastic cuff on the fitted sheet for a clean, crisp fit that won't slip off your mattress, enveloping pillowcases to keep your pillow secure, and an additional 4″ width to the flat sheet for complete coverage. Ideal for adjustable base or standard mattresses up to 18″ deep. TENCEL Lyocell fibers are botanically crafted from raw wood pulp and provide a cool-to-the-touch, naturally breathable sleep surface. Featuring a sateen weave, PureCare Elements Cool Touch sheets provide a soft-as-silk feel and long-lasting comfort. PureCare's entire collection of sheets bear the Women's Choice Award seal. PureCare Elements Premium Tencel sheets are botanically crafted from raw wood pulp and provide an exceptionally smooth, cool to the touch sleep surface. Our premium Tencel fibers are woven in a sateen weave for long-lasting softness and comfort. Designed to provide the ideal fit for both standard and adjustable base mattresses up to 18" deep, our premium sheet sets feature Precision-Fit corners for a clean, crisp fit on the fitted sheet and a 1 inch Precision-Fit elastic cuff which prevents your fitted sheet from slipping off your mattress. The enveloping pillowcases secure your pillow in the case throughout the night while an additional 4 inches of flat sheet provide complete coverage. Sheet set includes: fitted sheet, flat sheet, and two pillowcases.