Unpacking 1. Unroll Take the Emma mattress out of its box, place it on a flat surface and unroll it. 2. Unwrap Carefully make a small cut in the plastic packaging using the cutter provided to unwrap the mattress. 3. Wait The mattress regains its shape naturally in about 5 hours. 4. Sleep You can lie down on your beautiful Emma mattressand, finally, enjoy a beautiful nights sleep.