It contains 4,000 grams. It contains 100% Hcs Virgin Bead Fiber. Since it is filled with a special blowing technique, it is equally fluffy and airy at every point. It is fixed to your bed with crossed elastics on the edges. Fibra Mattress Pad not only keeps your bed clean, but also protects you from harmful organisms such as mites and bacteria that form on your bed if your bed is old. Mattress Pads - Toppers have been an indispensable member of bedrooms around the world for many years. Regardless of the quality and features of your mattress, a topper covered with natural cotton fabric and filled with spring-resistant bead fiber will add a sleep quality and comfort you can t even imagine. Fibra Mattress Pad is a special product that increases the softness of your mattress and its support for your body when laid on your existing mattress. Washing Instructions: Only Dry Cleaning Recommended.