Sports caps liners our crashproof helmet liners have internal reinforcements that are stronger and provide better protection Baseball hat liners a creative hat accessory that highlights your style while keeping you comfortable during all outdoor activities Safety insert liner lightweight bumper inserts for baseball caps that are comfortable and stylish Crashproof hat liners designed for use on hats in maintenance, auto assembly, machining, rail transportation, workshop processing, outdoor sports and other industries Key benefits enhanced protection internal reinforcements strengthen headgear for improved safety comfort and style lightweight, comfortable, and stylish inserts that complement outdoor and work wear versatility and compatibility designed for baseball caps and other hats used across a range of environments and industries Use scenarios industrial and manual work onthejob protection in maintenance, auto assembly, machining, rail transport, and workshop processing outdoor activities hiking, cycling, running, and other outdoor sports where lightweight protection and style are desirable everyday use travel, commuting, and casual wear where added head protection and comfort are valued