Pack contains - 5pcs x 4 prints = 20 masks Comfortable Material-The dust mask is made of activated carbon non woven fabric, comfortable to wear for protecting the face. With good windproof and dustproof effect. Flat Folding with Unisex Universal Size - Face shape design, nose portion of an aluminum sheet secured to prevent slipping and HOOk&LOOP adjustable size, suitable for most people to protect the face. This respirator can be easily carried due to its flat folding design. Breathable Ventilation Design - Mouth have ventilation holes, double air valve help you breath easier and freely when riding the bike and various activities.Low breathing resistance with high filtration efficiency. Head straps are ultrasonically bonded to the mask, no staples are used. Widely used: This respirator is suitable for shopping trips, outdoor travel, transport stations, visiting public places.