Wide Waist Bamboo Briefs made with delicate and soft bamboo viscose. Seamless and elastic free design is perfect for everyone looking for comfortable underwear. Wide Waist Bamboo Briefs are perfect for sensitive skin. They don't cause skin irritation, itching or scratching. Bamboo feels like a blend of cashmere and silk on your skin. Eco Bamboo Collection is made with organic bamboo viscose and environmentally friendly packaging.