With Tree-Knken, Fjllrven has explored alternatives to fossil-based raw materials. Made from Pine Weave, a unique fabric produced using more sustainable methods from certified Swedish trees grown close to Fjllrvens hometown of rnskldsvik. The material is waxed, giving it a natural melange effect. The backpack combines the simplicity of Knken with carefully modified details that give Tree-Knken its own identity: reflective logo, flat front pocket and a strap for fastening gear underneath.