Retaining hook for a safety net of a vehicle

A retaining hook (10) for a luggage retaining net (12) in a vehicle (14). The retaining hook (10) has a body portion (32) having an extension along a longitudinal axis (34). The body portion has a first end portion (36) which may be attached to the luggage retaining net (12) and a second end portion (38) which can engage a mounting such as a load ring (28) affixed to the vehicle. The body portion (32) of the retaining hook is unitary and is arranged to undergo controlled plastic deformation when acted upon by a force having a magnitude greater than a predetermined value to thereby reduce the amount of energy to which the mounting (28) is subjected in use.