I used to have some really comfy shoes and half-boots. Wide, round toes, smooth contours, leather, sometimes with fabric at the ankles. Soles were similar to the Clarks Funny Dream shoes. Very hard-wearing. Always bought in England, but not a British make. Possibly Spanish? I think the name may have included some variation of 'natural'.
Ring any bells?
(They were not Joseph Siebel, because I could never find anything wide enough for my toes in that make.)