MUJI UV Cut Breathable Water-Repellent Safari Hat 56.5-59cm, Black This item was purchased new, washed once, and then stored. It is in near-new condition, with the exception of some wrinkles from storage. The material cuts over 90% of UV rays. It uses fabric with a UPF50+ rating, the highest value for the Ultraviolet Protection Factor, making it breathable. Waterproof tape is applied to prevent rain from entering, and it has been treated with water-repellent processing. The chin strap detaches when pulled on the attachment point. This design allows it to detach if caught on an obstacle. The size can be adjusted with the inner belt.