Low profile P100 filter with Odour relief. The Odour relief is perfect when odours caused by nuisance levels of organic vapors and acid gases are present. This low profile filter is designed to be used for applications such as welding because of its pancake shape. The slim shape of it allows the user to wear the filter under their welding mask. P100 rated filters filter 99.97% of all particles including oil-based air-borne particulates. These filters can be directly mounted to North masks or attachments. The filters can be attached to the canisters to make the non-P100 cartridges into P100 cartridges with an attachment sold separately.