?Breathable & Comfortable? This mask material is 100% cotton, skin-friendly and odorless, 4 layers 4D design, good breathability, breathing is very comfortable, while wearing comfortable, in addition to meet your daily work, study and life, in outdoor sports, you can still choose it, it can give you protection at the same time, will also give you a good wearing experience. ?Adjustable Ear Straps & Filters? Each pack of masks comes with 10 filters for you to replace at any time, It can give you an extra layer of protection. Before you wear the mask, please place the filter on the inside of the mask. Our ear masks are also adjustable, so you can adjust them according to your face shape. ?Multiple Colors Available? This mask is a pack of 9 colors, we provide 9 colors for you to choose, to meet your daily work, study, life needs, at the same time, this mask is also a gift, can be given to family, friends, give them a full range of protection. ?Washable & Reusable? The 4D face masks are reusable and washable. After receiving our masks, please wash them with water and dry them naturally in a well-ventilated environment, so that they can still be washed repeatedly for future use to keep them clean. ?4D Humanized Design Face Mask? In order to achieve a better wearing experience, we designed a 4D mask, which can give a more comfortable breathing space, good breathability, and also effectively prevent dust from entering the mask. Hand Wash. Ear Loop closure. Cotton.