Breathable waterproof footwear is most likely to get sweaty and wet inside when used in damp or wet conditions. If the outer fabric or leather absorbs water, the breathability of the footwear will be reduced. Therefore, the Durable Water Repellency (DWR) of your footwear must be maintained to ensure comfort. It will eventually wear off and need to be renewed with Nikwax Fabric & Leather Proof™. When you’re active and wearing footwear, your socks draw moisture away from your feet, keeping them dry. However, if your footwear absorbs water and ‘wets out’ its breathability will be reduced. Moisture vapour will not be able to escape through the material, so your feet will feel clammy and wet. Nikwax Fabric & Leather Proof™ adds Durable Water Repellency (DWR), which prevents water absorption, whilst maintaining breathability, keeping your feet dry and comfortable.