Say hello to the breathe happy BH98 re-useable face mask that has simple to use replaceable filters that just need replacing every 7 days Your breathe happy BH98 re-usable mask can be worn shopping, out and about, at work or play and can be worn 24 hours a day without using efficiency. Just make sure you change the filters every seven days. Your breahe happy is made from silicone and is amazingly comfortbale because it forms a gentle but effective seal over your noe and mouth. In tests this filter achieves 99.9% Bacterial Filtration Efficiency (BFE). Paper masks do not form a seal around the nose, mouth and face and approx. 20% of all air inhaled and approx. 30% of air exhaled is unfiltered. Thats\'s good isnt it\" Yes, and there are big costs savings too. 1 filter replacees seven paper masks if you are using one a day! 7 paper masks = 1 filter. We are good for the environment too by not using lots of paper and elastic materials to make our wonderful tiny but clever filters. Easy to look after. Just put your breathe happy mask in a pan of boiling water fr a minimum of 5 minutes to sterlilise is and your off! The head band is easy to fit and adjust and will fit most children from the age of eight