Abstract: An adjustable cap has a crown portion shaped for fitting over the crown of a wearer's head, with the rear part of the crown portion formed of a stretchable material. A two part peripheral band is secured around the lower peripheral edge of the crown portion on the inside of the cap. The first, front part of the band is of a moisture absorbent, non-stretch material, and the second, rear part extending across the rear of the crown portion is of a stretchable material. The rear part of the band stretches to adjust the size of the peripheral opening to fit wearer's of differing head sizes.