I seriously have no answer to this question..

[Trevor]

[Flangepart]

Well, when you get this sudden obsession with brain eating, your cloths sense goes right out the window.

[LilCerberus]

Well....
First they get tackled, then wrestled on the ground, then in order to get nibbled on, the other zombies need to get through a few layers, & finally, they're lying in the dirt in violent convulsions for a few hours, aaannnddd, viola! Krappy Clothes!