The Seal Skinz Rain Hat is an ingeniously styled waterproof & windproof hat that has been based on the classic sou wester hat with an extended rear brim to also keep the rain off your neck making it ideal for hiking fishing & other outdoor activities This waterproof hat has a soft touch outer with a mesh lined interior an elasticated inner band & detachable chinstrap for a comfortable fit & the extended rim definitely offers you that extra level of weather protection where you need it Sizing Advice for Seal Skinz Hats Simply measure the circumference of your head in centimetres just above your eyebrows & use the below as a guide