My son's school has a blazer which is meant to be machine washable. It's an eco-blazer - so similar to polyester. I haven't been brave enough to wash it yet (had it dry cleaned in Y7), but tonight I've noticed it's a little whiffy under the armpits.
Before I stick it in the machine, can anyone reassure me that a) washing it won't ruin it and b) it will dry quickly so he can wear it in the morning.