CAYL Seorak 7 Ultra Light Grey Official description: The CAYL "Seorak 7 Ultra" is a square-shaped, waterproof sacoche. The fabric uses Ultra fabric, a new material that combines high levels of lightness, strength, and waterproofness. The main pocket has a water-stop zipper, so you can rest assured even in light rain. The reflector bungee cord on the upper part of the front pocket prevents luggage from falling out, and also reflects at night. The shoulder straps, which can be easily adjusted in length from both sides, are both buckle-type, so those with hoods or long hair can put them on and take them off without stress. 3D air mesh is used on the contact surface of the shoulder straps, providing breathability and cushioning. I have used it several times in the city. There is no deterioration of the laminate or any major scratches. It seems to be rare as it is sold out in every shop. I am waiting for additional photos and questions.