TM 10-8415-209-10 TM 8415-10/2 e. Chemical Protective Overshoes, Gloves, and Helmet Cover.   Green and Black Vinyl Overshoes (GVOs and BVOs) (1); CB Glove sets (2); and Chemical Protective Helmet Cover (3), are worn with any of the chemical protective clothing ensembles.  The GVO, which replaced the Footwear Covers, Chemical Protective (CPFC) (4), is itself being replaced by BVO.  Gloves are available in three thicknesses, depending on mission and are worn with cotton liners (5) for comfort. 1-8