RayonImportedSPA-LIKE SOFTNESS: The secret’s the fabric blend: 40% bamboo rayon/60% micro-polyester. You get the luscious feel of bamboo PLUS the silky feel of microfiber. Result: skin-caressing comfort.BREATHABLY COOL: Did you know that bamboo absorbs moisture 4 times better than cotton? Wicks & evaporates, too. Helps keep you cooler in summer, warmer in winter & comfier all year ’round!IDEAL FOR DEEPER MATTRESSES: Our deep-pocket fitted sheet fits up to 16 mattresses. Plus, it’s elasticized all around, so it’ll stretch taut & stay put all night. Cal King sized sheets sets include: Flat Sheet 108 x 102, Fitted Sheet 72 x 84, 2 Pillowcases 20 x 40.NATURALLY HYPOALLERGENIC: Allergy troubles? Breathe easy! These sheets resist pollen, dust mites & even harmful bacteria. (They also resist stains & wrinkles, so they look as good as they feel.)FULL LIFETIME WARRANTY: We’re sure you’ll love these affordable luxury sheets the very first time you try them. But if you don’t, contact us anytime & we’ll gladly refund or replace them.