Men's bamboo fibre brief 75% bamboo, 20% acrylic, 5% spandex Cool, breathable, durable, anti-bacteria, feel cool in summer Men bamboo fiber brief: 75% bamboo, 20% acrylic and 5% spandex.Bamboo fibre has the feature of anti-bacteria, breathable, durable, deodorization good colour stickness, absorbent etc. which you could feel very comfortable and cool in summer time. Not stick to your skin. Cool ...