Lahinch black rain hat is made of 4-way stretch which is waterproof with good breathability. All seams are sealed with a soft and flexible tape. The water-repellent treatment on the material is PFC-free. The material is 3 layers thick with the same soft, stretch fabric both outside and in, with a tech membrane between the layers. This membrane keeps the rain out and allows your body heat to be wicked away to the surface where it evaporates. The rain hat is slightly adjustable in size. Abacus logo at the front. Material: 100% polyester. Size guide: S = Head circumference 59 cm, M = Head circumference 62 cm, L = Head circumference 65 cm.