If you own gore-tex or other waterproof breathable gear, you need this stuff. Unless you don't use said waterproof gear, then you don't need this stuff since it's made for people who do use their gear. I use the tech wash too, but I'm not sure if it's worth it, some gear just says use powdered wash soap. The TX Direct works great, and I think the wash-in stuff works a lot better than the spray on. Now that I think about it, I need to buy more!