airSpun, airKleen and airRoll are a range of progressive coarse filters, made from coarse continuous glass fibre threads. Most of the variants have been treated with nondrying adhesives to increase collection efficiency and dust retention capacity. They are available as pads, rolls and cassettes. airSpun is intended for use in various ventilation applications, and is particularly suitable as a prefilter to increase the life of fine filters. A special version for capturing paint particles is available for use with spray painting. airKleen is intended for use in dirty environ-ments with high dust concentrations and heavy dust particles, and for vehicles and machinery of various types, such as trucks, trains and gas turbines. airRoll is used in automatic roll filters. airSpun, airKleen and airRoll are available in filter classes G2 and G3 in accordance with SS EN 779.