Klein Tools P100 Half-Mask Respirator A Respirator with Real Comfort The Klein Tools P100 Half-Mask Respirator is everything your need from a mask with the benefit of a comfortable design. With its thermoplastic elastomer construction, this respirator is hypoallergenic, odorless, and incredibly light weight, making it safe for any user with special medical needs. For added versatility, this mask can be worn with welding helmets, visors, hearing protection, goggles, and hard hats, making it perfect for any job. The overall shape of this mask fully seals around your face to prevent your goggles or glasses from fogging up. The filters used are highly efficient, replaceable, particulate HEPA filters which can handle rough air quality conditions with ease. To ensure your visibility goes unobstructed, they are low profile, meaning they protrude from the mask as little as possible. These are also designed to be as light weight and small as they can be to prevent breathing resistance.