E-Serie Core

An adjustable strap only changes the circumference, not the proportions. On a smaller head, a standard cap's crown is still too deep, so you get puckering at the back and the peak sits lower over your eyes even at the tightest setting.

Wrap a tape measure (or string) around your head above your eyebrows and ears. Under roughly 54-55cm generally means a standard cap will run big, and a smaller-fit style like our E-Series will sit properly.

A properly small-fit cap like the E-Series is cut with a shallower crown and a low profile from the start, so the fit is right at the base measurement rather than relying on the adjuster to do all the work.

Alongside the smaller-fit build, the E-Series has a wide high-ponytail opening, a quick-adjust rear cinch cord and a pre-curved peak. It's not just sized down, the proportions themselves are different.

It's an adult running cap for smaller heads, not a kids' cap. If you're shopping for a younger runner, get in touch and we'll point you in the right direction.

Look for a shallower crown and a low profile built into the pattern from the start, not just a tighter adjuster. That's what separates a genuine running cap for smaller heads, like the E-Series, from a standard cap pulled in at the back.