Abstract: A convertible poncho which may be adapted for use either as a protective covering for bicycles, motorcycles and the like, as a ground cover, or as protective rainwear for the rider. The cover is detachably secured to the bicycle by fastening means attached along the peripheral edges and to the interior faces of the cover. Additional fastening means are provided to detachably secure selected portions of the cover in a folding arrangement to adapt the cover for use as a poncho or as a ground cover. Apertures in the fore and aft portions of the covering are provided to allow a lock or cable to pass through the covering and capture a wheel of the vehicle. A detachable hood may be wrapped around the seat of the vehicle and secured by a drawstring or may be attached to the cover and adapted for use as a protective hood for the rider.