The classic T4 Tilley Hat, designed with a broad brim, belongs to the category of Tilley Hat fabrics that started it all - the cotton duck. The fabric is derived from an incredibly durable sailcloth that is still used in boating today. Features: Guaranteed for life not to wear out Insured against loss Excellent sun protection, rated UPF 50+ Dark underbrim for glare protection Repels rain, floats Ties on in the wind Machine washable, won"t shrink Secret pocket Broad brim with ventilation grommets