Individually fitted helmet liner

A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.

A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets comprising ethylene-vinyl acetate and being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.

A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets comprising a copolymer of ethylene and methacrylic acid and being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.