Quality Material: our soundproofing large acoustic panels are made of quality polyester fiber, which has a better soundproofing effect than soundproofing foam boards; It features flame Retardant, wear resistance, and durability; Safe to breathe and touch, and it's safe for adults, kids, and pets Self Adhesive Design: the soundproof wall panels with glue on the back; No special tools or materials are needed for installation; Just peel off the protective film and stick the sound dampening panels to the wall, door and ceiling Large Size for DIY: the package contains 5 large size sound noise absorbing panels; The size of each one is 47 x 24 x 0.4 inches; Quality polyester fiber material, convenient for you to cut into any shape you want without affecting performance Wall Decoration: large scale acoustical wall panel adopts classic stripe pattern, the distance between the V grooves of the stripes is 1.2 inches; The simple pattern can be integrated into y