Lakeland ActiveMen's Fleece-Lined Dockray Clogs

is the fleece lining removable

Are these roomy? Looking to buy for my Nan who gets swelling in her feet, so wondering if they’d be suitable for size fluctuations (like crocs).

if the holes are for ventilation, do they let in water on wet puddly days?

Are the dimples for ventilation or just decorative?