The hat in question has a band of material which is permeable to perspiration and is designed to come into contact with the skin, this band being attached on the inside to the circumference of the head part of the hat, on top of a corrugated laminar element which is in contact alternately with said band inside of the cap and which defines a series of channels lying transversely to said band in order to allow air to circulate.

Advantageously, at least one of the edges of said corrugated laminar element, and preferably the lower edge, is not corrugated and as such offers a certain degree of rigidity, in addition to allowing easy attachment.

One or a series of openings which allow ventilation to the exterior are formed in the actual head part of the cap.

The drawing shows one possible embodiment of the model and, more specifically: Fig. 1 shows a side view of a cap in partial section; Fig. 2 shows a view from above; Fig. 3 shows a local section on the plane ttt-ttt marked in Fig. 1; Figs 4 and 5 shows local sections on the planes IV-IV and V-V marked in Fig. 3; and Fig. 6 shows a partial perspective view of the characteristic ventilation structure.

According to the illustrations in the appended drawings, the reference 1 denotes the head part proper of the cap or similar item which can have a peak 3; the head part 1 has at least one opening or a series of openings 5 which are usually mesh-like in order to allow ventilation to the

exterior, thereby complementing the structure, described below, that is attached around the circumference 1A of the head part of the cap in order to facilitate ventilation.

Provided around the inside circumference 1A, so that it comes into contact with and rests against the head, is a band 7 of material which is permeable to perspiration and offers a high degree of comfort, such as that known as"CoolmaS'and manufactured by Du Pont or some other material, which is designed to rest against the head but still allow perspiration to pass through so that the latter can be removed by the ventilation which is provided in the manner described below.

To this end, the band 7 is attached to the inside circumference 1A of the head part 1 by means of a laminar element which has a certain degree of rigidity but is still flexible and is made of a synthetic resin or other material.

This element is denoted 9 as a whole and is characteristically corrugated so as to form a series of channels 10 which lie transversely with respect to the band 7 and are therefore perpendicular to the circumference 1A of the hat.

This corrugated laminar element 10 is bonded, or at all events anchored, alternately to the band 7 at the points 9B on the one hand and, on the other, is placed against or anchored to the inside circumference 1A of the hat at the points 9C. The lower edge 9A (looking at Figs 1 and 4,5 in particular) of the laminar element 9 is not corrugated as is the rest of its width, with the result that said edge 9A is in continuous contact with the bottom edge of the circumference 1A of the hat; this means that attaching said element 9 to the inside surface of the circumference 1A of the hat, by means of stitching or in some other suitable way, is a simple operation and it also means that the edging as a whole has a certain degree of rigidity. The presence of this lip 9A, which has not been deformed in a corrugated manner, divides up the spaces due to the corrugations so as to create channels 10 altemating with the corrugations which are open towards the inside of the hat, as indicated clearly in Fig. 3. The areas 9B attached to the band 7 can be narrower than those 9C forming the contact points with the circumference 1A in order to enhance the effects of ventilation and removal of perspiration.

Irrespective of the way in which this structure 7,9 is shaped or produced or how it is applied, a relatively dense series of channels 10 are formed which encourage ventilation in the direction of the arrows shown in Figs 1 and 5 in particular, which allows perspiration to be removed as a result of the air carrying it away as it appears on the surface of the band 7 facing these channels 10; the perspiration and the air which circulates through the channels is removed through the opening or openings 5 formed in the head part 1 of the cap which preferably does not actually touch the scalp but remains raised above it, not least as a result of the hair on the head, thereby facilitating ventilation and thermal insulation.