The North Pancake series, from North Safety, are flexible and low profile P100 respiratory filters designed to fit in different tight places. The Pancake series provides respiratory protection against aerosole, dusts, mists, fumes, fibres and other particulates up to 0.3 microns of size, the company said. The Pancake series is approved by the NIOSH standard to be used with the North full-face and half-masks (5500, 7700, 5400, & 7600 series). These Pancake filters can be used alone on the masks or in conjunction with North chemical cartridges (except 75SC defender series) by using the N750035 adapter. The North Pancake series is classified by NIOSH as P100 particulate filters, offering 99.97 per cent protection efficiency against oil and non-oil base particulates and aerosols, the company said.