PERFECT DEEP MATTRESS FIT - Mellanni specifically designed these sheets for extra DEEP mattresses and they are a perfect fit for 17 inch, 18 inch, 19 inch, 20 inch and even 21 inch mattresses. They are perfect for extra tall and thick mattresses, double pillow top mattresses, memory foam toppers, big mattress pads, air mattresses, waterbed mattresses and even adjustable beds! For mattresses 16" and under try Mellanni classic collection sheet sets. | EXTRA DEEP POCKET QUEEN SHEET SET comes with Mellanni Signature Z-fold technology elastic edging all around and insures your Extra Deep fitted sheet will stay in place, will not shift and elastic will never snap. 4 PIECE SHEET SET - QUEEN size sheets include 1 flat sheet 102"x90", 1 fitted sheet 80"x60"x21", 2 pillowcases 20"x30". Pillowcases have straight opening and beautiful decorative embroidery. Great for any room in your house - bedroom, guest room, kids room, RV, vacation home, or bnb | HIGHEST QUALITY BRUSHED MICROFIBER - Mellanni's Signature highest quality double brushed 1800 collection microfiber complemented by superior workmanship make our bed sheet sets LAST! They are extra silky soft, more comfortable and more durable than cotton. Fabulous selection of colors will make your bedroom look like it belongs in a magazine. Great gift idea for house warming gift, men and women, Moms and Dads, Valentine's - Mother's - Father's Day and Christmas | EASY CARE - Fade, stain, shrink, pill and wrinkle resistant. Pet friendly. Machine wash in cold. Dries quick on tumble dry low | LIFETIME MANUFACTURER GUARANTEE - Mellanni is a different kind of company that prides itself in providing the absolute best customer service in the industry. If for any reason you decide that this bed sheet set is not for you, send 1 simple email and receive a 100% money-back refund, absolutely no questions asked (in fact, you don't even have to return the set)