I am planning to buy a wallet for my dad but I am quite skeptical about the quality of the wallet that I intended to buy. You see, the previous wallet was supposed to be leather but it's all frayed now. My friend told me that even leather would fray. 

Actually, how do we take care of our leather wallets and other leather goods so that they last longer? The reason I am asking is because leather-wear are not cheap! 

Should I just polish it more often?