1. The Fjallraven Kanken is available in a wide variety of colours and styles. They are made from a blend of polyester and cotton, and come in regular, small, and large sizes. You can also buy a solid black version if you prefer a simple style. Kanken frost green Fjallraven first created the Kanken backpack in 1978 as a way to save schoolchildren's backs. The simple yet functional design quickly became popular in Sweden. The Kanken is constructed of durable Vinylon F fabric, which is both water and dirt resistant. The main compartment is spacious, and it also includes two side and front zippered pockets. A reflective logo on the front keeps you visible in low light. The Kanken square backpack is the most popular of the Fjallraven products. Its vinyl F construction is both durable and comfortable to use. It also features a front zippered pocket and matching polyester straps and back straps. The Kanken is also versatile, as it can be used as a seat cushion or handbag. If you're looking for the perfect outdoor bag, the Kanken is an excellent choice.