Abstract: An adjustment strap for a jacket hood which includes a plurality of buttonholes spaced apart at a distance equal to a separation distance between two buttons located on an interior surface of the hood. One end of the adjustment strap is permanently anchored to the jacket or hood with the other end being slidable within a sleeve extending about the periphery of the hood opening. The adjustment strap is slidable between three positions to provide varying degrees of reduction of the size of the hood opening. At each of the three positions, at least one button is secured to the adjustment strap to maintain the position of the adjustment strap and thus the size of the opening of the hood, at a fixed position. Intentional manipulative effort must be performed to change the position of the adjustment strap so as to alter the size of the opening of the jacket hood.