100% organic + biodegradble hair ties. Terra ties are plastic-free, 100% biodegradable hair ties. Unlike standard hair ties that are made of synthetic rubber and polyester, terra ties are made from natural rubber and organic cotton. In addition to being 100% biodegradable and having packaging made from recycled materials, terra ties, which come in packs of 27 hair ties, are softer, thicker, and more durable than standard hair ties. Available in black. One size fits all.