The S-One Lifer Helmet is the best fitting, high-impact and multi-impact Australian-certified helmet on the market. 

Now 2 FREE SIZING KITS with ANY S-One Helmet purchase! You'll never have to guess a size again, making them the perfect hassle-free helmet option!

Just add your helmet to your cart and the free offer will pop up for you in the cart!

We recommend checking the sizing below / off S-One's top notch sizing chart, then selecting the sizing kits above and below the helmet you're ordereing.

Check out the liners here: S-One Helmet Liner Kits

Sizing: S: 53.5cm (21"")
M: 54.5cm (21.5"")
L: 56cm (22"")
XL: 57.5cm(22.5"")
XXL: 58.5cm (23"")
XXXL: 59.5cm (23.5"")

How to measure:
Use a soft tape measure to measure the circumference (around) of your head and an inch (2.54cm) above your eyebrows. Keep the tape level front to back. If you don't have a measuring tape, use a piece of string or shoelace, then lay it out on a table and measure it with a ruler.
 

- Multiple and high-impact EPS Fusion foam

- Deep Design

- Sweat absorbing liner

- Lightweight construction

- High impact ABS outer shell