The Honeywell North HM500 Series Half Mask is engineered as a lightweight: durable soft half mask with easy operation features. Available in non-drop-down and drop-down versions: to ensure better comfort and convenience for extended wear. The drop-down option allows workers to remove the masks without taking off hard hats: earmuffs or eyewear. Fully compatible with the HM500: Honeywell N-Series Filters and Cartridges are quick and easy to attach: securely staying in place to give you the confidence that the job will be done safely and productively.