ANORAK

NO! NO! NO! They are brightly coloured so you will be easily spotted, and they rustle so you will be heard from a million miles away. OK, so they’re waterproof, but I can assure you that in these dire circumstances rain will be the least of your worries. The only advantage to your wearing an anorak is that when you become a zombie (which you will because your friends will happily sacrifice you) it will be twice as enjoyable to kill you.