Invest in the right smart casual blazer and it will last you forever. No matter the dress code, if you've got an event planned this party season a blazer is a sensible choice. A good one can instantly elevate an outfit from drab to dapper and MR PORTER has no shortage of stylish options. Simply pair with a shirt, chinos and boots or suede loafers and you're good to go. Here are the ones to buy now...