A skirt or coat guard will save your clothes from being caught in the spokes of the rear wheel.
This robust plastic skirt guard attaches with a plastic ring which clips to the seat stays and internal hooks which attach to the inside rim of your mudguards. No tools required and easy to fit. They are sold in a pair (one for each side of the wheel).
The skirt guard has holes cut out for back wheel ring locks as commonly fitted to Dutch bikes. To fit the guard you will need mudguards, internal gear hubs and a wheel size of 700c or 27/28 inch.
Have a look at the skirt guard fitted on a Lekker bike.