Boxer Briefs by New Balance. Details:The New Balance Men’s Performance 5” No Fly Boxer Briefs are made to endure the toughest men! Made from a comfy polyester/spandex blend, our boxer briefs are stretchy, breathable, and durable. They come in multiple sizes: Small (29-31” inches), Medium (32-34” inches), Large (36-38” inches), and X-Large (40-42” inches). Our boxer briefs are great for everyday use and the mesh panels will keep you cool and dry! By using a high-quality polyester/spandex blend, these briefs will last wash after wash and remain soft. The elastic is designed to keep them in place without bunching! Putting on this underwear will be the best part of getting dressed.