A thermoplastic film that can be applied to various skin-engaging portions (e.g., the nose pads and/or earpieces) of a pair of eyeglasses to prevent slippage of the eyeglasses. The thermoplastic film comprises a composition that reacts to the wearer's body heat to become sticky. The resultant bond with the wearer's skin is sufficiently strong so as to prevent the pair of eyeglasses from slipping due to sudden movement, and is resistant to perspiration, oil or the like.