Cool cap

A heat-absorbing/radiating hat defining a crown area for disposition over the head of a user and including front and rear sides and a headband area encircling, at least substantially, a lower peripheral portion of said crown area, said headband area defining an upwardly opening channel extending along said lower peripheral portion, an elongated, semi-flat tubular body constructed of flexible, fluid impervious material removably anchored in and extending along said channel, said tubular body including generally flat opposite side panels joined along corresponding longitudinal and end margins thereof with said tubular body partially filled with fluid eutectic material, a plurality of pairs of opposing narrow zones extending transversely of said panels between said longitudinal margins and spaced apart generally equally throughout the length of said tubular body with said opposing zones being internally bonded together to divide the interior of said tubular body into a plurality of separate compartments spaced longitudinally along said tubular body, each of said compartments being partially filled with said fluid eutectic material and said zones defining transverse zones of said semi-flat tubular body along which said body may be folded, slightly, to enable relative angular displacement of compartments of said body disposed on opposite sides of each of said zones, said tubular body extending lengthwise along said headband area throughout said front side and rearwardly along opposite sides of said lower peripheral portion of said crown area toward and terminating forwardly of said rear side, said semi-flat tubular body including opposite end portions and a longitudinal central zone, said central zone being of a vertical extent less than the vertical extent of the opposite end portions of said tubular body.