Material and build ABS construction: The Helmet Locking System is made of ABS materials, wearresistant and durable. materials provide safer protection and longer product life. Key features Onehand adjustable strap: The adjustable buckles on the strap allow tightening or loosening with one hand, making it quick and easy to fit your helmet. Easy to use and adjust: Designed for simple operation to fit FAST helmets securely. Enhanced security and portability: The Helmet Locking Suspension System improves security and makes it more portable. Performance and reliability Stable and reliable: The system delivers steady performance and dependable use. Quality workmanship: Exquisite workmanship with a stylish, generous appearance. Trustworthy choice: Product quality is worthy of your trust. Compatibility Use type: Fits FAST helmets. Use scenarios Military or law enforcement training: Use with FAST helmets to ensure secure, quickadjustment locking during field exercises. Tactical airsoft or skirmish sports: Easy, onehanded adjustment supports fast helmet changes and secure fit during rapid movements. Field work and outdoor activities: Reliable helmet retention during transport and active use, reducing risk of helmet loss or displacement. Notes Compatibility: specifically designed to fit FAST helmets. Material: ABS construction emphasizes wear resistance and durability.