What Our Gearhead(R) Experts Are Saying:"I wear this cap on every run where the sun is a factor. It's light enough that I forget it's on, and the AEROREADY tech actually does what it promises - I'm not wringing it out mid-run. The reflective hit on the back is a small detail that matters a lot if you're doing early morning or evening miles near traffic. Fits true to size and the adjustable strap keeps it locked in even on faster efforts."Running into the sun on an exposed road, the last thing we want is a cap fighting against us. The Adidas Run GRF Cap earns its place on our head by doing exactly what it should - managing moisture efficiently with AEROREADY technology and staying put through the full arc of a long run. The laser-cut ventilation channels move air where heat tends to build, while the pre-curved brim keeps glare out without creating tunnel vision. When we're still moving at dusk, the reflective detailing lets drivers see us coming. Simple construction, recycled materials, no drama.