I have been using this product for well over a year now, and it certainly does exactly what it says it will do, providing 'maximum and long-lasting waterproofing' and 'maintaining support and breathbility'! My daughter has participated in 'Ten Tors' (a moorland walking event), for two years in a row now, and often uses this product on her walking boots due to its excellent quality and reliabilty. I reccommend 'Nikwax Fabric and Leather Proofer' highly. I would also like to add that the customer services at Cotswold are particulary good, and provide a fantastic service! :)