Decozen throw pillow inserts will fit your decorative pillowcases well and give you a fuller throw pillow. They are not only for support but also for decorating your house. The pillows are filled with high-density microfiber. Soft but supportive. Gives you suitable back support. The package comes with a vacuum bag but immediately begins to fluff when you open the package. Please give them some time to expand to the proper size. For optimal use, please prepare according to the below: * Take them out of the vacuum pack * Pull the filler at all angles for 2-3 minutes, and then the pillow insert will become fluffy. * The best way to recover fluffily is putting it under sunlight for 3-4 hours.