A two sided motorcycle helmet that allows the operator to select between a full open face helmet and a fully enclosed face helmet. With the fully enclosed face orientation, a face shield protects the face of the wearer. With the full open face orientation, the wearer's face is open to the elements. A padding layer is provided on an interior surface of a shell of the helmet. A chin strap is operable to secure the helmet to the wearer's head in either orientation.

An impact attenuating helmet including an outer liner having an inner mating surface, an inner liner positioned under the outer liner and having an outer mating surface configured to be received by the inner mating surface of the outer liner, the inner liner and the outer liner being configured to move relative to each other along a slip plane between outer mating surface of the inner liner and the inner mating surface of the outer liner, and one or more securing attachments, each securing attachment being coupled to the outer liner and being configured to secure the outer liner to the inner liner, each securing attachment comprising a slack element configured to permit a range of movement between the outer liner and the inner liner.

An air inflatable and thus collapsible when air is removed, safety helmet preferably comprised of multiple inflatable lobes with a head conforming and surrounding inflatable ring and separate or integrated skull cap, for wear by the user, for placement on top of the lobes and/or for location within the chamber(s) formed of the lobes, or worn by the wearer directly upon the head, made of flexible, force absorbing and dissipating material. The lobes and ring are provided with quick release air inflation and deflation valves. The safety helmet can simply alternatively comprise air inflatable lobes with a minimally elastic outer covering to encase and minimize the movement or air within the chambers during a collision.

A helmet is described, more specifically a helmet comprising a protective shell (10) formed of a flexible expanded polyurethane (EPU) material which defines a cavity for receiving the wearer's head, the shell being foldable, the helmet further comprising a strap (11) arrangement for fastening the shell to the wearer's head.

Glasses for a helmet is configured to rotate a glass member in a state where the glass member is mounted onto the helmet by means of one touch, thereby allowing the glass member to be located in front of a wearer's eyes, and configured to reversely rotate the glass member, thereby opening the front sides of his or her eyes. The glasses for a helmet includes: helmet attachment members fixedly attached to the helmet worn on a wearer's head; glass mounting members separably mounted onto the helmet attachment members by means of one touch; and a glass member adapted to rotate in a state of being rotatably fixed to the glass mounting members in such a manner as to be located in front of the wearer's eyes.

A visor removably attached to a helmet includes a brim, a first wing extending from the brim, a first prong from the first wing engaging with the first side vent. A second wing opposite the first wing extends from the brim, a second prong from the second wing engaging with the second side vent. A distance between the first prong and the second prong is smaller than a distance between the first front wall of the first side vent and the second front wall of the second side vent, the first prong and the second prong respectively engaged with the first side vent and the second side vent through tension in the visor resulting from expansion of a wingspan between the first wing and the second wing.

A helmet with an outer shell, an inner liner, a plurality of vents, and an occipital cliff is disclosed. The outer shell includes an outer surface made up of a first and second surface, the first and second surfaces joined by a drop-off running across the outer surface from a left side of the helmet to a right side of the helmet. A majority of the drop-off is closer to a coronal plane bisecting the helmet than it is to the rear of the helmet. The drop-off is contained within a posterior section of the helmet defined by the coronal plane. The first surface defines a top of the drop-off and the second surface defines a bottom of the drop-off, such that the drop-off has a height. The occipital cliff is located at the rear end of the helmet and is approximately perpendicular to the second surface proximate the drop-off.

A safety helmet includes a shell, a flexible frame attached to the shell from inside, and a slide-facilitating member attached to the flexible frame from inside. In virtue of the slide-facilitating member, the shell when receiving incoming impact can slide with respect to a head of a user wearing it, so that the safety helmet can absorb and convert energy of the incoming impact force into other forms of energy, thereby enhancing protection to the user's head.

A safety helmet includes a shell, a flexible frame attached to the shell from inside, and a slide-facilitating member attached to the flexible frame from inside. In virtue of the slide-facilitating member, the shell when receiving incoming impact can slide with respect to a head of a user wearing it, so that the safety helmet can absorb and convert energy of the incoming impact force into other forms of energy, thereby enhancing protection to the user's head.

A liner (10) for fitting within a headcap to provide a degree of impact protection, said liner comprising a generally concave shell for receiving a wearer's head, in use, and having a top section (16), a front section (12) and a rear section (14), and a pair of side panels extending downward from, and integrally formed with, respective side edges of said top section (16), wherein a first slot (14a) is provided on each side of said rear section (14), extending from a side edge thereof to a hinge portion (14b) located between said top portion (16) and said rear section (14), and a second slot (12a) is provided on each side of said front section (12) extending from a side edge thereof to a hinge portion (12b) located between said top portion (16) and said front section (12).