Help your birds nest in style! All the materials used in this pack are naturally sought after by wild birds or other little critters to make their nests. The mix is made up of; Michigan Merino wool and natural jute, along with White pine needles and organic field grasses from Northeastern Michigan landscape. Product Details: Merino Wool: the wool has been cleaned, carded and handled organically. All material strands are also no longer than 2 “ – as requested by the Cornell Lab, to help prevent matting/tangling for the safety of the birds. 100% Merino wool is sourced from Michigan sheep ranches: The partnering ranches take pride in their low carbon footprint and humane care for their sheep. The Merino wool is mite, mold and mildew resistant, fire retardant and water repellent. These factors leave no worries if birds build in structures where they really shouldn’t. Package’s label is recycled paper and the bag is made of 100% plant material and certified 100% Compostable. Need something to offer this nesting material in? You can check out our Birdie Bell. Once nesting season is done you can use it as a feeder for seed bells year round! Made in the USA!