【Certified STANDARD 100 by OEKO-TEX】Stuffed with advanced 5D snow down alternative fill that has a ultra soft and bouncy feel. Our mattress topper king have twice the premium filling of the traditional mattress pads, which improves the texture of the bed and the quality of sleep effectively. Certified by Oeko-Tex Standard 100 to be free of harmful chemicals, safe and healthy for you and your family. 【Extra Thick & Breathable】Our mattress topper is generously filled with 900gsm of premium hollow fibre for the ultimate in plush comfort, extra thick filling helps relieve back pain. The quality filling will absorb sweat making it breathable, stay perfectly cool and comfortably warm with optimal temperature control, avoid being hot and sweaty, so you're able to enjoy a refreshing and restful relaxation experience. 【Instantly Refresh Your Old Mattress】If your mattress is too firm, adding our mattress pad cover is a great choice. An excellent way to restore the support of an old or a too-firm foam mattress or simply improve the softness and comfort of any mattresses. Also, it is an affordable upgrade for any bed instead of buying a high-cost mattress.