These Sofia boots by UGG have been crafted with a suede upper and a rubber sole. The details include: a lace-up closure with gold-tone metal eyelets and flat laces, a stitched panel design with an embossed logo to the heel, a shearling lining, an almond shaped toe, a contrast sole and a mid-height rubber heel. ABOUT ME Upper: 100% Leather. Lining: 100% Leather. Sole: 100% Rubber. Heel: 9cm/3.5" UGG Australia is produced in US sizes. In accordance with the UK UGG Australia distributor, they are converted to their nearest UK whole size. For example, if you order a UK size 5 you will receive a UK 5.5 size equivalent to UK size 5.