Abstract: A liner for insertion into a concavely curved inside of an associated protective helmet, in particular a bicycle helmet, which extends along a longitudinal direction from a front side to a rear side, comprises at least two anchoring points for anchoring the liner to the protective helmet. The liner is also configured to be put under a shear stress along the inside of the protective helmet by the anchoring and to thereby assume a predetermined curved contour.

Abstract: A helmet, in particular to a bicycle helmet, having a plurality of ventilation openings and at least one evaporation cooler that is arranged in a ventilation opening.

Abstract: A helmet strap for fastening a helmet to a head comprises at least one strap belt having a Y shape that has a first arm, a second arm and a third arm to be fastened to the helmet at a respective helmet side by two of the arms and for the remaining arm to be able to extend up to a chin region of the head. In this respect, the strap belt comprises a first part belt that extends without interruption along the first and third arms and a second part belt that extends without interruption along the second and third arms, wherein the first and second part belts are fixedly interconnected along the third arm or are formed materially integrally with one another along the third arm.

Abstract: A helmet, in particular to a bicycle helmet, having a plurality of ventilation openings and at least one evaporation cooler that is arranged in a ventilation opening.

Abstract: A method of manufacturing a protective helmet, in particular a bicycle helmet, that has a shock-absorbing helmet body having a concave inner side and a convex outer side and that has an outer shell arranged at the outer side of the helmet body. The method includes the steps: placing the outer shell into a mold; and filling a casting material into the mold at at least one filling point to form the helmet body. The casting material connects to an inner side of the outer shell. The filling point for the casting material is provided at the outer side of the formed helmet body, with the outer shell having an opening in the region of the filling point.

Abstract: A helmet strap for fastening a helmet to a head comprises at least one strap belt having a Y shape that has a first arm, a second arm and a third arm to be fastened to the helmet at a respective helmet side by two of the arms and for the remaining arm to be able to extend up to a chin region of the head. In this respect, the strap belt comprises a first part belt that extends without interruption along the first and third arms and a second part belt that extends without interruption along the second and third arms, wherein the first and second part belts are fixedly interconnected along the third arm or are formed materially integrally with one another along the third arm.