This Royal Elite Natural Australian Wool Pillow is filled with 100% Australian Wool. Wool is a natural and eco-friendly material. Wool has excellent breathability and moisture-wicking properties which helps regulate body temperature. Wool fibers are durable and plush, providing a comfortable consistent support to the head and neck during sleeping. This medium-support pillow is ideal for side and back sleepers. Standard 20 x 26'', Queen 20 x 30'', King 20 x 36''.