Purchased in 2021. I used these bags when I rode an American bike (Honda Magna 250). The muffler-side bag is smaller to prevent heat damage from the exhaust. Please note that rain covers are not included. The following is from the product description: The muffler-side bag is downsized to avoid interference with the muffler. Large capacity of approximately 20L + approximately 12L, suitable for long touring. The bags open and close with a swing buckle, which is easier than belts. The connecting belt between the left and right bags is adjustable in length. A drink holder can be attached to the larger bag. The opening has a double-zippered inner flap to prevent rain from entering. Asymmetrical design with a balance of design and usability. Thank you for viewing.