Our box is made of the PP metarial. It can protect your facemask far away from polution, dust, and bacteria. Tiny design is very convinient carry. It can storage 3-5 pieces facemask one times.It ideal for shopping and travel camping. The construstion is strong and surface smooth, it will not hurt your hand. 7 1/4" L x 4 5/16" W x 1/2" H