The bw foldon box is a unique transport case for folding bikes the foldon box is design to carry all brompton bikes as well as most other folding bikes the internal walls have protective foam padding and the polypropylene abs shell offers excellent impact protection as well as being very light 61kg the foldon box is held tightly closed with 2 robust straps with lockable buckles suitable for tsa compatible locks moving the foldon box is easy with fixed wheels at the back and rotating