We used Kookaburra Woolwash for 2 years before deciding to offer it to our customers. It has been almost 5 years since that time and we are still in love with this amazing woolwash. Why? For one thing, the Tea Tree oil not only fights off bacteria, but leaves behind a fresh, envigorating aroma that really does make washing (and wearing!) a pleasure. Then there's the fact that Kookaburra Woolwash is formulated with just the right amount of lanolin to soften your clothing, but not so much that it compromises the natural ability of wool and other natural fibers to absorb moisture. And, you get this softening effect with having to skip the rinse cycle -- this is especially important for babies and others with sensitive skin. Finally, a little goes a very long way. For us, a 16 oz bottle lasts about 6 months - your mileage may vary, but we're sure you'll be surprised and delighted by how little you need to get your natural fiber clothing cleaner, softer and fresher than ever before.