Abstract: A cap utilizing evaporative cooling interior apparatus includes a cap having a generally dome-shaped head covering portion defining an interior cavity. A plurality of elongated tapered porous liquid evaporating pads are removably secured within the cap interior in a spaced apart arrangement. A plurality of air passage channels are formed between the evaporative pads to promote air circulation about the pads within the cap interior. The pads are formed of a porous material having the capacity to absorb and retain a substantial quantity of liquid such as water. The pads preferably contact the user's head and provide a cooling effect thereon as the liquid within the porous pads evaporates.