What features make Smith's Quantum Helmet stand out? Find out in our review 

Smith Quantum Helmet RRP £255 

This is one of the most expensive helmets we’ve reviewed, but you do get an extremely good lid for your money. It also looks pretty cool. The hybrid shell construction comes with a MIPS system along with an impact-resistant Koroyd inner, which is used in conjunction with Smith’s ‘Aerocore’ design to allow better airflow through the helmet. This is further aided by an impressive 22 adjustable air vents, with the front vents being adjusted independently of the rear (and vice versa).

A fully adjustable Boa FS360 fit system keeps the helmet secure on your noggin, and the ‘Wayfinder’ strap system, which uses a Fidlock buckle, is the best one-handed system I’ve come across. The lining is designed to wick away sweat, and the ear pads can be removed in warmer conditions; the lightweight goggle lock is also removable. In addition, the Quantum is compatible with Outdoor Tech audio systems.

FOR Excellent all-round protection system

AGAINST Liner doesn’t offer a great deal of padding; expensive

Smith say:

The new Quantum is protection with maximum horsepower. Using Aerocore™ construction featuring Koroyd® and Smith’s innovative Exoskeleton design to provide increased protection in side-impact zones, this is the helmet for athletes pushing the limits on the mountain. The new Wayfinder Strap System featuring Fidlock® is functional simplicity, making it easy to use one hand for on and off buckle use. For the most custom fit, the Quantum offers the Boa® FS360 fit system with a 360˚ halo design. Combine all this with the Smith-pioneered AirEvac technology for superior goggle integration. The Quantum delivers maximum protection and functionality for use in the most critical situations.