These towels, are made out of 100% bamboo fiber, which means they are soft as silk. Since they come from the fastest growing plant on earth and there is no fertilizers, pesticides, or chemical treatments involved in producing them, these towels qualify as being metaefficient.
Originally we linked to bamboo towels for sale at Amazon and Mad Mod, but they are now both sold out until 2006. So the only vendor left is Natural Fibers.
Available at Amazon.