KankenStraight backs are happy backs! Knken was created as far back as 1978 to help prevent back problems among Swedish school children and quickly became a common sight at preschools and nature schools throughout the country. Today, 35 years later, Knken has straightened millions of backs across the globe and has become one of Fjllrven's most beloved products. This classic backpack is equally suited to journeys to and from school or work, as it is to