Genuine Pure Polaris Snowmobile Pro-Ride RMK Underseat Bag pt# 2876427 Fits Model Year 2011-2012 PRO-RIDE RMK, 2013 144" RMK, 2011-2013 Switchback Assault and 2007-2011 IQ RMK Carry extra gear in a convenient, out of the way location with this bag (does not work wtih Tunnel Bag - pn 2877198). Material: 1000-denier black nylon Self-adhesive Velcro attachment 500 cu. in. volume