99extra Underwear, 6 Color Sale Men's Cartoon Bird Bamboo Fiber Skinny Boxer Briefs 95% Bamboo Fiber/ 5% Spandex Bamboo fiber contains an antibacterial substances called "Bamboo-Kun", it will inhibit the growth of bacteria, prevent mites, deodorant, Japanese scientists have found that bacteria which on the bamboo fiber products will be killed about 75% after 24 hours Slim-fit size, usual smaller 2 size than standard size chart, please note that. International EMS delivery, U.S. domestic 7 to 15 days reached, other countrys 10 to 25 days reached. Doctor advised, a underwear don't use more than 6 months, it will become very dirty although you repeated wash it.