Just curious, but the straps are leather. Wouldn't washing kinda ruin them?

Sorry for the newbish question. I have yet to wash my kilt and I think it needs it considering I wore it all day at the Dunedin Highland Games. Plus, I want to wear it again, and I can't when it is sitting near the washer waiting to either be washed or taken to the cleaners. However, after reading these posts, it sounds like the cleaners is out of the question. My kilt, by the way, was bought at the Highland Games last year. Found out that it is probably a Gold Bros kilt. Synthetic material, very comfortable, very sturdy. I like it. Anwyays, gentle cycle, warm/cold water, hang to dry? Lightly press the pleats?