Walser Aerotex
Price: £39.95
Similar instructions (which arepredominantly in German) suggest there is a connection between this set of covers and the Ripspeed. Certainly they have the same neat solution to side airbags, and the Aerotex design here should help keep you cool. Sadly, they moved around when we repeatedly got in and out, and an elastic strap came off when we were fixing the base.