Granger Black Porvair. Have everyday chic with these black over the knee flat riding style boots. These detail an outside none functional zip, side buckle and elastic stretch panel which helps towards a more comfortable fit. Long Boot W/ Elastic Panel And Bottom Buckle / Strap. 1.48 inch heel. Material: Porvair. Lining: Black. So buy this Granger Black Porvair Was £109.95 Now £89.95.