From Tilley website - The Airflo that started it all. Featuring a sleek oval-shaped brim for all around sun coverage, and our signature mesh ventilation to keep the cool air flowing. Made from 100% recycled nylon, it repels the rain, blocks the sun, and makes any adventure a whole lot breezier. Hat is guaranteed for life by company. Rated UPF 50+ DWR Finish (Durable Water Repellent) Bouyant Brim - Front & Back: 3 1/2" Sides: 2 1/2" Crown Height - Side crown height: 4" Size 7 1/2 - 23.5" / 60 cm Worn once - great condition. No stains, rips or tears. Dog-friendly, non-smoking home.