Protective sports helmet

A football helmet to be worn by a player, the football helmet comprising:

• an outer shell;
• a multi-layer liner assembly disposed within the outer shell, the multi-layer liner assembly including an inner-layer, a middle-layer, and an outer-layer;
• wherein the inner-layer is positioned adjacent to the player's head when the football helmet is worn by the player, said inner-layer:
• (i) including a first material, and (ii) having an inner-layer thickness at a first location;
• wherein the outer-layer:
• (i) includes a second material that is different from the first material, (ii) has a first outer-layer thickness at a second location, and (iii) a second outer-layer thickness at a location in a crown region of the helmet that is different than the first outer-layer thickness, and wherein the outer-layer has a density that is different than a density of the inner-layer;
• and
• wherein the middle-layer is positioned between an extent of an outer surface of the inner-layer and an extent of an inner surface of the outer-layer, and wherein said middle-layer:
• (i) includes a third material that is different from each of the first and second materials, and (ii) has a middle-layer thickness at a third location that is between the first and second locations, wherein the middle-layer thickness is less than each of the inner-layer thickness, the first outer-layer thickness, and the second outer-layer thickness.

An American football helmet to be worn by a player, the football helmet comprising:

• an outer shell;
• a multi-layer liner assembly disposed within the outer shell, the multi-layer liner assembly including an inner-layer, a middle-layer, and an outer-layer;
• wherein the inner-layer is positioned adjacent to the player's head when the football helmet is worn by the player, and wherein said inner-layer:
• (i) includes a first material, and (ii) has a segment with an outward extending projection;
• wherein the outer-layer is positioned adjacent to an inner surface of the outer shell, and wherein the outer-layer includes:
• (i) a second material, and (ii) a receiver that is configured to receive a portion of the projection, and (iii) a first outer-layer thickness at a first location in a front region of the helmet that is different than a second outer-layer thickness at a second location in a crown region of the football helmet;
• and
• wherein the middle-layer is positioned adjacent to an extent of an inner surface of the outer-layer, and wherein said middle-layer includes a third material that is different from both of the first and second materials.