Note – if between sizes our advice is to size up to ensure the perfect fit..
Once the right helmet size has been determined by measuring the circumference of the head, the helmet can be perfectly adjusted to each head using the uvex IAS 3D system. Simply loosen the system entirely and put the helmet on.
Now turn the dial at the back of the head to tighten the ring and thus the width.
The Uvex IAS 3D system should make contact with the head where you naturally have a curve at the back of the head. To ensure a correct fit, the height can be adjusted with the easy-to-use ratchet closure. Identify the appropriate height using two fingers and insert. Check the fit: even with the chin strap open, the helmet should have a secure fit.