Callaway junior 14 zip waffle fleece callaway junior 14 zip waffle fleece comes in one hundred percent polyester and two classic colours with opti therm technology opti therm is a process of design that optimises thermal well being and offers a layer of warmth and comfort the waffle fleece benefits from a quarter zip in contrasting colour this allows for adjustment according to condition and comfort of the wearer the two colour choices are castlerock heather or bright cobalt heath