【Before First Use】Before first use, dry your mattress topper on low for 20 minutes with dryer sheets to expand and fluff it for optimal comfort. Because the topper is vacuum-compressed for long-term storage and shipping, it may appear thinner than expected when first opened — simply give it time to fully recover its plush loft for the best sleep experience. Follow these steps for a truly fresh start!【Size Specifications】Twin XL: 39" × 80" Full: 54" × 75" Queen: 60" × 80" King: 78" × 80" Deep pockets fit mattresses from 8" to 21" thick — no slipping, shifting, or size worries.【Extra Thick & Breathable】The premium filling effectively absorbs moisture and regulates temperature, keeping you cool in summer and comfortably warm in winter. No more waking up hot or sweaty — enjoy refreshing, breathable comfort all night long.【Airy 4D Snow Velvet Filling】Stuffed with innovative 4D snow velvet microfiber, this cutting-edge fiber enhances air circulation and maintains a consistent sleep temperature. It delivers the perfect blend of cloud-like softness and breathable coolness for every sleeper.【Certified Safe & Skin-Friendly】Certified by STANDARD 100 by OEKO-TEX, this topper is free from harmful chemicals and safe for you and your family. Twice the premium filling of traditional mattress pads improves both bed texture and sleep quality effectively.【Instantly Refresh Your Mattress】If your mattress feels too firm or old, this topper offers an instant upgrade. It restores comfort, adds softness, and provides gentle support — all without the high cost of buying a new mattress.【Machine Washable & Easy Care】Machine washable for effortless care. Wash gently in cold water with mild detergent and tumble dry on low to restore fluffiness. Remove promptly after drying to minimize wrinkles and maintain a smooth, cozy feel.【Elastic Deep Pocket Design】Featuring a stretchy deep pocket design that fits mattresses 8–21" thick, this topper stays securely in place — no matter how much you toss and turn. Enjoy uninterrupted comfort and peace of mind all night long.