halo life face mask - reusable/washable with replaceable nanofiber filter - lightweight ultra-breathable form-fitting, specific sizes and adjustable to fit for women/men/children- 200 hour filter life halo life breathable cooling face mask with poly-honeycomb technology design and a soft bamboo liner allows you to comfortably wear your mask all day – even in elevated temperatures. lightweight face mask with an advanced nanotechnology filter that provides up to 99% protection from airborne pollutants and water resistant. washable face mask ideal for commuting, travel, outdoor, and everyday use. face mask has a secure and comfortable fit that is airtight. recommended sizes adults and kids alike: small for children, medium (or small) women, large (or extra large) for men. each face mask filter is inserted in the mask and is designed to be worn for over 200 hours before replacing. halo life offers 3-pack, 6-pack and 12-pack replacement mask filters online and in our brand store. this reusable & washable face mask is meant to be washed by hand only.