Lazer's 311g Oasiz trail bike helmet has been designed with help from four-cross legend Brian Lopes. It sports a deep rear coverage in-mould shell design and manages to combine this protection with a low profile. The rear of the helmet remains close to the skull, giving the effect of reducing the visual size of the helmet – especially flattering if you’re a rider who needs a large or XL size.
The Oasiz employs Lazer’s reliable and easy to use Roll-loc retention system snuggled deep into the rear mounted faux spoiler (which is similar to that on the Fox Flux). Roll-loc uses thin wire cable to evenly draw the inner pads against the head, rather than the localised pressure points of other systems. We normally take a medium in a Giro/Bell/Specialized and Lazer’s XXS-M 52-58cm model fitted perfectly.
If we had one request, we'd like the retention strap to be lower at the rear to sit under the curve of the rear of our head. It’s not loose, but it could be better. Lazer appear to have tried to keep the retention straps higher, hidden from view for the sake of aesthetics; we'd prefer to see them and have the option for a better fit. A feature we did like was Lazer’s use of thin ribbon straps, like Specialized use on their top-end Decibel helmet.
These soak up less sweat and dry much faster than traditional knitted nylon straps. The magnetic chinstrap buckle works well too. When you’re jamming on the gas the 21 large vents work well to keep your head well ventilated. The attractive, colour matched visor keeps the sun and rain from your eyes, though we'd have liked a little tilt adjustment.