Abstract: Precurled mitten to a grip a rod such as a wind surfing sail boom, including a wrist enclosing section and a hand enclosing section integral therewith to form a waterproof mitten cavity, the wrist section having a tightening strap to hold the mitten against the wrist, and the hand section terminating in a permanently curved hook portion and an opposed permanently curved thumb portion following the natural, relaxed contour of the user's curled hand to receive the first four fingers and thumb, respectively. The hook and thumb portions define a lateral curl-like bore spaced therebetween to receive and snugly embrace the rod independently of finger force and to facilitate its positive gripping under unrestrained and thereby reduced finger force through the mitten, and the wrist and hand sections are formed of waterproof, thermally insulating, shape retaining, pliable sheeting material to transmit, substantially undiminished, hand exerted gripping force therethrough to the rod when in the bore space.