A disposable liner is fitted against the inside surface of a sweatband of a cap or hat. The liner functions to absorb moisture and oils, and to eliminate odor. The liner wicks moisture away from a user and may hold moisture away from the hat. The liner may wick moisture to an evaporation region to be...http://www.google.es/patents/US5566395?utm_source=gb-gplus-sharePatente US5566395 - Liner for hat
