Dr KellerWomens Ladies Quilted Velour Faux Fur Lined Winter Warm Wide Opening Diabetic Orthopaedic Slippers

Do these have a gard bottom? Strong enough to have a 2inch build up added?

My mum suffers with bunions, which is why im looking for wide slippers. These mention a wide opening but are they a wide slipper or a normal slipper?

Will these be fine with someone who has swollen feet & are they true to size or would you have to up size