Hard hat attachment earmuffs with adjustable rotation angle and durable telescopic adjustment Key benefits Adjustable rotation angle for comfort and improved noise reduction. The flexible design fits a wide range of head sizes while preserving strong soundproofing performance. Wide application and universal compatibility with hard hats. Suitable for construction sites, industrial work, and any setting that requires hearing protection. The dual function of noise reduction and ear warmth supports year round use in varying conditions. Fashionable lightweight design. The color scheme offers a modern look without added weight. All day comfort is maintained without compromising protection. Durable telescopic adjustment. Engineered for longevity, the mechanism has withstood over ten thousand durability cycles. The firm yet smooth extension provides a secure fit that stays in place during active work, ensuring reliable performance in demanding environments. Applications and practical use Construction sites where clear communication and hearing protection are essential. Industrial facilities, factories, and machine workshops requiring dependable noise reduction. Maintenance tasks or any noise scenario where warmth and protection are beneficial in varying weather conditions. Specifications and features to note Function: hearing protection with adjustable rotation for position Compatibility: universal with hard hats Size adaptability: flexible design to fit most head sizes Material: durable hard outer cover for long lasting use Performance: reliable noise reduction and ear warmth for year round use Durability: telescopic adjustment tested for more than ten thousand cycles