Sizing
Measure first, then pick the fit that feels snug but comfortable.
Start with the sizing guide, match your head measurement, and choose the helmet that sits low, level, and secure without pressure points.
Support
Use this page for quick answers on sizing, returns, and care. If you need more context, jump to the sizing guide, buying guide, or contact support.
Quick answers
Sizing
Start with the sizing guide, match your head measurement, and choose the helmet that sits low, level, and secure without pressure points.
Between sizes
If you sit between sizes, the better move is usually to choose the larger helmet and add the surrounding size fit kit at a discount. That gives you the helmet with the liners for the size you ordered installed, plus the next size down and the next size up, so you can fine-tune the fit. For example, if you order a Large helmet with the surrounding size liner kit, you get Large liners installed and you also get Small and XL liners.
Returns
Yes - if it is unused and returned in original packaging. Always check the returns policy first and reach out to support before sending anything back.
Common questions
If you still need help after reading, hit the contact button and we will point you in the right direction.
Sizing
Start by measuring the widest part of your head, then compare it with the sizing chart. The helmet should feel snug and secure without hot spots or wobble.
Fit kit
The liner kit helps you fine-tune the helmet once the shell size is right. It is the easiest way to tighten up the fit without jumping to a different shell - and you can find the details on the fit kit page.
Between sizes
Go with the larger shell and adjust with the liner kit if needed. That usually gives you the most usable fit range and keeps the helmet comfortable for longer sessions. If you want a hand, start with the sizing guide or contact support.
Returns
Yes, if it is unused and returned in original packaging. Always check the returns policy first and reach out to support before sending anything back.
Help
Use the buying guide or contact us. We can help you work out whether you need a skate, bike, e-bike, or fullface style and point you to the right fit path.
Care
Keep it clean, dry, and out of harsh heat when you are not using it. If you are unsure about wear or damage, ask support before riding again.
Need more help?
Jump to the sizing guide, or contact support and we will help you choose the next step.
© S1 Helmets Australia. All rights reserved.
Operated by Trinity Distribution