Product description Olmed Cotton Mask, Łowicz Patterns - Black Properties: The mask has some of the functionality of the flagship model – a filtration system, exhalation valve and size adjustment. Product features: replaceable filters - filter inserts that help protect health against harmful particles, breathing valve - the valve facilitates the removal of moisture, reducing the feeling of shortness of breath and the fogging of glasses, nose fit - an aluminum element built into the structure allows the mask to fit the shape of the face, different sizes - for comfortable wearing, adjustable fastening - adjust the fastening length to your face size thanks to the easy adjustment system, safe for the skin - made of Oeko-Tex certified cotton, guarantees neutrality in contact with the skin. Each mask includes one replaceable filter insert. Apteka Olmeds regular product range includes filter inserts at prices several times lower than alternatives available on the market. These replaceable filter inserts, made from materials used in the production of surgical masks, provide additional health protection for you and your loved ones. Depending on the location and method of use, the filter insert can last up to 8 hours. The filter insert is made of the following materials: 1. Layer: Spunbond - Hypoallergenic material certified by the National Institute of Hygiene used in health care products. 2nd Layer: Meltblown. A material with antibacterial properties and filtration properties, providing 99% filtration of particles with a diameter of 2.7μm. Used in FFP1/FFP2 and FFP3 class masks. 3rd Layer: Spundbound In addition to comfort of use, the mask fulfills its basic function of supporting respiratory protection. Replace your face covering with a complete, breathable protective product. More information at: https://www.maski-olmed.pl/bawelna/ IMPORTANT! How to choose the right size? Please choose the right size - a wrong choice may result in reduced comfort and filtration properties. Head circumference - it is best to measure the circumference around the eyebrows using a piece of cloth or string. Length from eye to chin - this value is measured from the point ideally between the eyes to the end of the chin. Neck circumference, similarly to head circumference, is measured with an elastic material in the middle of the neck. SIZES MEASUREMENT S/M L/XL HEAD CIRCUMFERENCE [CM] 51-57 55-64 LENGTH FROM EYE TO CHIN [CM] 11-15 15-17.5PLEASE NOTE! - Due to the current situation worldwide, for the safety of our customers and employees - in accordance with Article 38, point 5 of the Consumer Rights Act, we do not accept returns of this product category if the packaging of the mask or replacement filter has been opened (this does not apply to warranty claims). Please make thoughtful purchases.