The SIZE Small has approximately the same circumference, but is less deep where it comes down above the ear. (The M/L is a slightly deeper fit)
The SIZE M/L (very standard adult hat size and adjustable velcro back strap)
These are very nice hats and will last you a long time. High Quality and comfortable running technical hat.
• 100% machine washable
• Ultra light weight, less than 2 oz.
• SweatVac® moisture management system keeps you cool, dry, and comfortable while stopping sweat from running into your eyes
• UltraVac liner stays dry against your skin and channels moisture away
• DriSmart technical shell provides rapid moisture evaporation
• Reflective technology on front brim and back fastener
• Black fabric under bill reduces glare
• Comfort-fit stretch fastener system delivers secure, one handed on-the-go adjustability and unsurpassed comfort