Burton Midweight Union Suit
Here's what other sites are saying:
The Burton Lightweight Union Suit gives your grandpappy's union-jack suit a teched-out overhaul fit for riding--but don't worry, the butt-flap is still there. Grandpappy never had to worry about snow infiltrating his crack because he wasn't really into snowboarding, but you do, so this suit helps with that, too. An antimicrobial finish helps keep stink away when you can't do laundry between each wear, and the four-way stretch fabric lets you move like a ninja when you're trying to steal cookies out of your roommate's stash after a long day of shredding.