the bass trap is speciliezed structure for the recording room,  and it is the best cost-effective and useful for the sound problems in music .many standing wave  probelms affect the efeect of thesound.
   the products is made from the fiber panel ,then around it by cloth,the color iscolorful,you canchoose you want.and it have no any harmful to the body,and canbe moved anywhere in the room.