Among other things, we describe an apparatus comprising a head covering configured to be worn on a head of a wearer; and a bill attached to the head covering, the bill comprising an angled array of air flow channels configured to enable air flow originating from a direction in front or to the side of the wearer enters into the channels from the bottom of the bill and then is deflected upward so it continues traveling inside the channels through the bill until the air exits from the channels when the air reaches the top of the hat bill.

A baseball cap with knitted and air permeable seamless crown formed as a one whole piece, having the crown and a peak; the crown has a dome shape, and is knitted by blended use of polyester yarn and shaping filaments; two sides of an interior side of the crown are each provided with several partial binding off regions; a circular sweatband is provided near a lower edge of an inner wall of the interior side of the crown.

A protective helmet. The protective helmet includes an outer layer and an inner layer, each formed of a hard material. The outer layer and the inner layer each further include a concave interior surface and a convex exterior surface. A flexible connector connects the concave interior surface of the outer layer to the convex exterior surface of the inner layer. The flexible connector is configured to allow the outer layer to laterally shift relative to the inner layer upon impact to the protective helmet. Upon impact, the convex surface moves along the inclined planed of the concave surface in a direction opposite of the impact, while the stretched flexible connector provides a restoring force pulling the inner and outer layers back to their original positions.

Baseball caps to be worn on a person's head are provided. According to one embodiment, a baseball cap includes a dome configured to be placed on the wearer's head, wherein the dome includes one or more panels and one or more cooling channels. The baseball cap also includes a hub positioned at a top of the dome. The hub comprises a central cavity and one or more conduits in gaseous communication with the one or more cooling channels of the dome. A coolant output port is provided in gaseous communication with the central cavity of the hub. The coolant output port is configured to supply a coolant gas to the one or more cooling channels of the dome via the central cavity of the hub.

Baseball caps to be worn on a person's head are provided. According to one embodiment, a baseball cap includes a dome configured to be placed on the wearer's head, wherein the dome includes one or more panels and one or more cooling channels. The baseball cap also includes a hub positioned at a top of the dome. The hub comprises a central cavity and one or more conduits in gaseous communication with the one or more cooling channels of the dome. A coolant output port is provided in gaseous communication with the central cavity of the hub. The coolant output port is configured to supply a coolant gas to the one or more cooling channels of the dome via the central cavity of the hub.

A hat includes a brim having a front portion and a back portion. The hat also includes a crown which is coupled with the back portion of the brim. The brim includes one or more intake ports placed along the back portion of the brim and the crown includes one or more exhaust ports.

A hat includes a brim having a front portion and a back portion. The hat also includes a crown which is coupled with the back portion of the brim. The brim includes one or more intake ports placed along the back portion of the brim and the crown includes one or more exhaust ports.

The present disclosure is directed to head ventilation devices and systems. A shell which may be worn as a hat includes a gap along at least a portion of a user's hatline defined by one or more spacer assemblies. An airflow assembly disposed at an upper end of the shell and spaced apart from the user's scalp causes airflow through the gap and an upper opening to ventilate a user's head. Additional protection features for sun shading, inclement weather, and/or safety may also be included.

The present disclosure is directed to head ventilation devices and systems. A shell which may be worn as a hat includes a gap along at least a portion of a user's hatline defined by one or more spacer assemblies. An airflow assembly disposed at an upper end of the shell and spaced apart from the user's scalp causes airflow through the gap and an upper opening to ventilate a user's head. Additional protection features for sun shading, inclement weather, and/or safety may also be included.

An apparatus and method for providing cooled clean filtered air to the wearer of this device while allowing them to remain inconspicuous and to do so using inexpensive easily obtainable filtration supplies.