What’s Included: 4 New Balance Men’s Performance 5” No Fly Boxer Briefs underwear. The sizes are available in Small (29-31” inches), Medium (32-34” inches), Large (36-38” inches), and X-Large (40-42” inches). Ultimate Comfort: Made from 90% polyester and 10% spandex, the New Balance Men’s Performance 5” No Fly Boxer Briefs are super soft, tagless and breathable and will provide you with the ultimate comfort, staying cool and dry all day long. 90% Polyester, 10% Elastane Machine Wash Fastening: No Closure Boxer Brief NB3017-4 Superior Design: The New Balance Men’s Performance 5” No Fly Boxer Briefs feature an elastic waistband for added flex and will sit comfortably on the waist. These briefs also feature a “no-ride” inseam and tagless labels. You will not have to deal with any uncomfortable bunching from this lightweight fabric! Incredibly Durable: These boxers are incredibly durable and are highly fade resistant to washing and drying. How to Wash: Washer and dryer safe! Machine wash cold with like colors. Only non-chlorine bleach when needed. Tumble dry low. Do not iron.