Prologo u clip saddle attachmentits as easy as a click do you need a bag or a light to be seen by with u clip system you can quickly hook on the tool you need without disturbing your riding features allows you to accessorize your prologo saddle by neatly securing a prologo u bag or u light sold seperately suitable for all prologo saddles available in a variety of colours to accent your saddlebuyprologo componentsfrom chain reaction cycles the worlds largest online bike store