When Dutch designer Doreen Westphal received a bag full of inner tubes as a joke Christmas present she started to play around with the material, which resulted in her first inner tube bag. After much experimentation and study Krejci succeeded in creating TUBUS, a line of strong, unique looking bags based on unusual materials: original Amsterdam bicycle inner tubes and felt. Dimensions are 11 1/3" x 14 1/2" x 2 1/2".