THOMSON Drop Bar & Seatpost Storage Bag Set Both are unused. A set of nubuck drawstring bags included with the purchase of a Thomson handlebar and a nylon seatpost bag. The strings glow in the dark, which is convenient. There is a stain on a part of the post bag (please check the image). The handlebar bag looks stylish and can be used as a small everyday bag. What should we use the seatpost bag for? Size Handlebar bag: 59cm x 27cm Seatpost bag: 53cm x 11cm