Bonded dual-stage open cell foam matrix with 6 millimeter outer foam and 10 millimeter inner foam layer. Washable and re-useable, with high strength glued seams that won't fall apart. Pre-oiled with Maxima FFT filter oil. Complete with disposable gloves and packaged in a resealable bag. Fits: Yamaha YFM 250R Raptor 250 2008-2014.