99extra Underwear Men's Milk Silk Low Waist Pouch Briefs 95% Milk Silk/5% Spandex Imported Very important: Acidic or alkaline laundry detergent will destroy "milk silk fiber", it only be used neutral detergent. Milk silk is better soft, thin, light, and breathable than cotton. Very easy to washing Special long pouch design, looks more sexy, stronger and interesting For this bikini's waist size is different of your usual other underwear, please careful read the measurement method on the below Doctor advised, a underwear don't use more than 6 months, it will become very dirty although you repeated wash it You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!