Adidas Copa Mondial football boots are easy to break-in, comfortable, no blistering EVER! Extremely soft kangaroo leather. I have very wide feet and for years have put up with blisters and bad foot pains from the boot being to narrow.. i use to wear nike air legend however this year i decided to buy predator 'wide fit' however after having a walk around in them i could feel the same old trouble spots hurting up again.. so i decided to try the narrow copas on and was amazed at how comfortable they were. despite being a narrow boot they are amazingly comfortable and so far ive used them for a month and am yet to get a blister or any major foot pains from these boots. highly recommended! Uncertain life span due to soft leather.