Men's Black and Red Christmas Fair Isle Underwear - Xmas Boxer Briefs. There comes a special time of year when a man delves into the back of his wardrobe to pull out his secret weapon - his Christmas underwear. This Black Reindeer Christmas Men's Underwear is a fitting tribute to the ugly Christmas sweaters of yore, featuring reindeer and snowflakes rocking their way around your Christmas tree. These uber comfortable boxers offer an elasticated waist - great for that winter "breathing room" and our very own Tipsy Elves logo emblazoned on the waistband. In a classy red and black design, they're sensible enough to wear to the office, but also festive enough to show to one lucky lover this Christmas. Machine Wash Cold, Hang dry.