mki face mask. 50% poly, 30% elastic, 20% non woven fabrics. metal nose clip. elastic ear loops. velcro neck strap. twin one-way discharge valve allows air to escape without heating up the mask. internal twist valves to secure the replaceable filter in. washable and reusable. mki branding on the neck strap. comes with 1 x 5-ply filter. one-size fits all. this mask is not approved for use in a medical environment, nor is it classed as personal protective equipment. mki store ltd make no claims about the medical benefits of using this product. for official government guidelines visit gov.uk. the effective working life of the mask filters depends on a number of factors, such as: the breathing rate of the user, ambient levels of pollution, daily usage, hygiene levels. taking these factors into account; if used every day; we recommend that the filter be replaced every 2 weeks. once purchased, mki store ltd take no responsibility in the maintenance of this mask. Please note that in the interest of hygiene and safety, this item is non-returnable.