Depends on the kind. Soft bread freezes really well, so when I make burger buns or sandwich loaves I always make extra and freeze them as soon as they cool. I thaw at room temperature the day I want to use them. Crusty bread can be revived by sticking it under a running faucet and then putting the wet loaf into the oven for a few minutes. I usually do it at 350°F but I don't know how long. I just check frequently.