Skin Cancer Foundation Recommended. The ultimate adventure hat for tackling the elements, the Summit hat is crafted from lightweight, quick-drying fabric. An adjustable chin strap ensures a secure fit, while its packable design makes it perfect for unpredictable outdoor conditions. A hidden pocket in the crown adds convenience, keeping your ID, keys, and credit cards safely tucked away during every expedition. UPF 50+ fabric blocks 97.5% of ultraviolet rays, according to the Australian Radiation Protection Agency Brim is 3 ½" front and back and 2 ½" on each side Inner drawstring adjusts fit Packable: Pack flat 100% microfiber, exclusive of trim Handwash cold Crown sizes: M/L (59cm) and L/XL (61cm) Equipped with hidden pocket in the crown for ID, keys, and credit cards Wallaroo hats do not feature a built-in magnet for emblems. For hats with magnetic emblems, please purchase Carkella hats.