Vinylon F is the functional fabric that has made Kånken daypacks seemingly immortal for the last 25 years.

While being a synthetic fiber, Vinylon F still has many of the positive properties of natural fibers. Fabrics conventionally used for backpacks need a coating in order to become water resistant. However functional initially, this coating loses its properties over time, making the backpack less waterproof. Vinylon F does not need a coating. Absorbing moisture better than any other synthetic fiber. Vinylon F swells like a natural fiber, thus making the weave more dense when it's raining. This gives the fabric waterproof qualities by construction eliminating the need for a coating.

It's both light and extremely durable, making Vinylon F an unbeatable material. The fabric will continue to prove its durable functionality year after year. Vinylon F has a ratio in the combination of being light and extremely durable that is unbeatable by any more modern material. The weight is 145 g/m² which compares to most modern very light materials used in backpacks but these materials can only survive and deliver half the result in hard durability tests.