Renowned for its ventilation and comfort, the Leatt MTB 4.0 Helmet is an all-purpose helmet that provides excellent protection at a great price. This helmet features 360 Turbine technology, which helps to reduce rotational acceleration and absorb impact energy to minimize the risk of head and brain injuries. The DBX 4.0 Helmet is fully ASTM DH certified, making it the go-to choice for enduro and bikepark riders. Whether you're riding uphill, downhill, upside down, on an E-bike or trail, this helmet has got you covered. With its full-face design and removable mouth piece, the DBX 4.0 Helmet offers outstanding ventilation. It also features a convenient Fidlock® buckle for easy fastening. When it comes to crashes, we all know that they can happen, and sometimes they can be pretty hard. That's why it's important to have the best helmet possible to protect your head and brain. The 360 ÌŠ Turbine Technology used in our helmets consists of 360 ÌŠ moving discs made from an energy-absorbing material. These turbines help to reduce rotational acceleration and absorb energy upon impact, providing superior protection at concussion level. So, next time you head out for a ride, make sure you're wearing the best helmet for the job. Stay safe with the Leatt MTB 4.0 Helmet.DH certified Lightweight Polymer Compound shell in two sizes Brain injury reduction technology Reduces forces associated with concussion Maximized ventilation with 22 vents Removable mouth piece ventilation cover | Fidlock magnetic closure system Dri-Lex® moisture wicking, breathable, antiodor and washable inner liner Optimal neck brace compatibility Visor with breakaway function for rotational reduction in a crash In-molded EPS + EPO impact foam for superior energy absorption 360 Turbine Technology Reduced peak brain acceleration by up to 30% at impact speeds associated with concussion Reduces peak brain rotational acceleration by up to 40% Weight: From 850g (1.87 lbs) Certified and tested: AS/NZS 2063:2008, ASTM F1952–10, EN1078, CPSC 1203 Sizing #S (55-56cm – 21 5⁄8 - 22”), #M (57-58cm – 22 ½ - 22 ¾”), #L (59-60cm – 23 ¼ - 23 5⁄8”), #XL (61-62cm – 24 – 24 ½”)