Quintessential Essential. Beau is quintessential XIRENA and an essential basic. Made in a classic lightweight woven cotton poplin for a lived-in look and feel, the Beau Shirt has a menswear-inspired shape and is a must-have season after season. Borrowed From Your Boyfriend - Our most relaxed and generous fit, we took this one straight from the boys. Buy in your true size or size down for a slightly less oversized fit.