The RADIX Vented Safety Helmet is comfortable thanks to its four-point LUX Suspension system, the helmet will fit securely on the head. The magnetic quick-lock, adjustable chinstrap makes it ideal for working at height and on the ground. The ventilated outer shell protects against impact hazards. With its potential for integrating an ARCLIGHT headlamp, LIFT hearing protection, and multiple accessories, it is an entirely modular helmet, thus meeting the specific needs of multiple industries. Lifespan 3 - 5 Year Average Liftspan: Hard hat lifespan may vary depending on the conditions of each work site. Hard hats subjected to more wear and tear or used outdoors in direct sunlight may need to be replaced more frequently. Daily inspections are the best way to determine when to replace a hard hat shell, suspension, or the entire unit. Hard Hat Weight Our Safety Helmet weighs in at an average 495g grams with suspension. Features: 12 Ventilation channels provide enhanced air flow for comfort and breathability Brim grip, exclusive design provides a secure feel Oversized ratcheting fitment dial to adjust size is easy to grip and use with gloves on or off Integrated accessory clips with six (6) external built-in attachment points internal liner assists with moisture-wicking and comfort and is easy to replace and wash Secure four-point connection with easy release magnetic lock One size fits most, Standard Head Size 6 ½ - 8 (52-64 cm head circumference)