The One K helmets are available in 3 shell sizes. By using the One K foam liners
you can achieve the perfect fit. This system allows the helmet to grow with the
young rider. One K helmets are available in 2 shapes, Regular and Long Oval
which emphasizes an elongated head from front to back and slightly narrower
measurement from side –to – side.
Wearing the wrong shaped or size helmet can lead to increased pressure and
discomfort. One K has options for perfect the fit. Please note that both
Regular and Long Oval shaped helmets use the same liners. Shape is determined
by shell, not the liner.