The backpack has a unique design, inspired by the shape of the surfboard, and adopts a rolling mouth design, which can easily adjust the space and maintain a sleek appearance. The backpack is equipped with adjustable clips to ensure good waterproof performance and avoid damage to the zipper due to sea water and sand. The backpack structure is equipped with comfortable shoulder straps and sturdy handles to cope with various environments. The interior features multiple pockets, including a zippered pocket for valuables. In addition to practicality, the backpack is full of fashion sense. Whether on the city streets or outdoor adventure, this backpack can be your perfect companion.

Shape: Since do not carry books, so = organic shape, more like shoes, round.

The backpack "roll-up waterproof" is connected on each side with adjustable parts to optimize space and round surfboard shape (nose and tail).

Here is the commercial reference: Use the roll top as a closing system with two connecting parts distributed on each side. Good water resistance, no problem with the zipper, prevent the zipper from oxidizing or getting stuck in salt water sand.

The elastic rope/tensioner system is used to construct the bag and allows to reduce the gap to avoid having a bag "floating", like a pair of pants that are too wide.

There are two types of systems, elastic and adjustable straps. The elastic member may provide more tension and may avoid adding too many clamping rings. This is reminiscent of the fit of a surf suit cover.

Regular sewn nylon strap. Thin 15mm nylon strap for drawstring, drawstring 4-5mm.

We discuss whether the dorsal part of the bag is closed or bare, as in the case of the blue bag. A sturdy ergonomic strap and a well-sewn handle to avoid any tears in the future.

For this bag, it has been determined that the strap does not need to be strengthened, its use is occasional. (Refer to excursions, etc., not hiking).

The pouch attached to the backpack becomes a detachable pouch, which is hung on the two vertical straps of the bag with two loops. Can be turned into a "banana" bag.

One inner pocket with zipper (or Velcro, to be determined) for finer items, keys, etc.

In order to facilitate pulling, the bag must have a rimport, just like Ortlieb waterproof bag (here is the packman model)

The advantage of two vertical elastic strips allows the user to hang a certain number of "unforeseen" objects, such as wet clothes.