Dakine Dirt Series Duffle Bags
Trek Dirt Series coaches have been using bags like this for years, and now there's a customized version available for camp participants too.
The bags have a U-shaped opening for easy access, a zippered end pocket perfect for shoes, and a removable padded shoulder strap.
They are 3100 cubic inches, and are 22 x 11 x 11 inches in size. That's 51L, and 56 x 28 x 28 centimetres, and just the right size for all your riding gear -- helmet, gloves, shoes, glasses, change of clothes, etc.
Click on the image above for a larger image and an image showing the end of the bag.