Ergodyne Skullerz 8945 Universal Safety Bump Cap Insert, Lightweight, Fits Into Any Baseball Hat Universal Bump Cap Insert bee a charge can be used

a charge can be used for 24 hours and reach 30 days of ultra-long battery life

and the spandex biding is made from 73% recycled materials

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Diameter: 1/24" (150 PCS)

Ergodyne Skullerz 8945 Universal Safety Bump Cap Insert, Lightweight, Fits Into Any Baseball Hat Universal Bump Cap Insert bee a charge can be usedErgodyne Skullerz 8945 Universal Safety Bump Cap Insert, Lightweight, Fits Into Any Baseball Hat Product Features LIGHTWEIGHT HEAD PROTECTION Guards against bumps, scrapes, bruises and other minor head injuries POLYETHYLENE SHELL Durable material resists breaking and cracking FITS ANY HAT Patented trim to fit design easily adjusts insert height to fit different cap designs BREATHABLE Strategically placed vents for continuous airflow FLEXIBLE