The Moskova Underwear, we've been selling these for the past 6 or 7 years and it's one of our top-selling items in the store. I've had mine for 4 years and it goes threw the wash and dryer and it lasts. It's a hit with our customers that are golfers and hikers. They were actually made for the jiu-jitsu guys. The Boxer Sizes are European Boxer Sizes so you guys in Japan get the Boxer Size you normally buy and for you guys in the US need to go up to the next Boxer Size. This one is 95% cotton so it's comfy in warm weather.