For long runs in high heat, where airflow matters more than anything else on the cap.

The M-Cosmos, in brown, pairs a structured front panel with SOLARA mesh at the rear, an open honeycomb weave with four-way stretch that keeps air moving as the pace and the temperature climb. The build uses 100% recycled yarns, and a moisture-wicking sweatband handles the rest, so heat doesn't build up under the crown.

• SOLARA mesh rear panel: open honeycomb weave with four-way stretch that moves air when the pace and the heat both climb
• Pliable peak: folds flat for the bag, holds its shape when it's out
• Quick-adjust rear strap: sized to sit secure on a smaller head or a larger one, so fit isn't a guess before you buy

Check out our full M-Series collection, part of our wider running caps range.