Please Note: The Tilley Hat is designed to be worn low on your head and slightly loose. It should be held on by gravity, not by painful pressure on your forehead. Tilley suggests that you purchase your hat one size larger than your regular hat size. UPF 50+ Sun Protection Guaranteed for Life The stylish Tilley TTW2 Tec-Wool Hat combines a medium profile design with their adaptive c_change® technology engineered to retain or expel heat as needed to keep you comfortable, no matter what. Ideal for morning walks or all-day hiking, the TTW2 is lightweight, versatile, and chock-full of all the functional features you've come to expect from Tilley (see below for details). Tilley Resources: Guaranteed for Life Details & FAQs Register Your Hat Owner's Manual Approx.3 1/2" Flat Crown2 1/2" Brim5 1/2" Ear Warmers Made of:88% Wool12% Polyurethane Features: Designed in Canada Guaranteed for Life UPF 50+ Sun Protection Rating c_change® adaptive temperature control technology Waterproof Buoyant (Floatable) Unique tuckaway earflaps DWR Finish for rain and snow repellency Hydrofil® anti-sweat band to wick away moisture Secret pocket in the crown - store cash, IDs, and credit cards Crushable and packable Lightweight (4.8 oz/136 grams) Soft polyester lining OEKO-TEX® certification Dry clean only Size(s): S, M, L, and XL. Fits true to size. See Tilley's sizing recommendation note at top of description.