Anji Mountain Bamboo Rugs are made from the strongest, most durable bamboo on earth. They only 5 year old bamboo when others use younger, weaker bamboo for their rugs. These rugs also feature a ventilated, non-slip, rug pad backing (patent pending) which gives a comfortable cushion underfoot, keeps the rug in place and allows for spills and moisture and resists mold and mildew. Anji Rugs features over 16 styles of bamboo in many unique and popular sizes-way more than any others. *If these rugs are used outdoors it is recommended that they be stored inside when not in use to maximize the life of the rug.