A cap that failed at mile eight was designed for the shelf. The physics were knowable months earlier.

The soaked-weight problem

Fabrics are weighed dry, worn soaked; absorbing materials gain an ounce a runner has to carry.

Wicking fabric keeps the water moving and the weight constant.

Where sweat actually goes

Without a channelled band, sweat obeys gravity — straight into eyes at exactly the pace you care about.

A properly engineered band routes it to the temples and keeps routing when saturated.

Where heat actually leaves

Heads vent at the sides and crown, not wherever the design felt balanced.

Laser perforation and placed mesh dump heat without letting the crown collapse.

The buyer’s checklist

Grams on the spec, wicking named, band routing described, vents placed with a reason.

Four questions, answered in samples not adjectives, sort every supplier.