aparently its a clothing line in Japan.....
http://www.9channel.com/taobao/product-501...st-briefs-.html
"This is a new men’s underwear brand “Crab Secret”
Fitting hip, soft, comfortable, fit.
Cotton, Lycra, so that you feel close and comfortable.
Wide belt, vibrant colors, very sexy, hot
"
Mens and Womens underwear line..... aparently according to a friend I have thats living in Japan right now they are very comfortable, warm. Kind of like a thermal underwear similiar to underarmor.