[Disaster Prevention Helmet] MIDORI Safety Foldable Helmet TSC-10N Flatmet2 White 1 pc A foldable helmet offering excellent storage efficiency, portability, and safety, compact enough to fit within A4 paper size and only 4.5 cm thick when folded. Weight : 375g Dimensions: ・When collapsed: 281 x 210 x 45 (mm) ・When worn: 281×210×132(mm) Head Circumference : 55cm-64cm Shelf Life : 6 years