Nikwax TX.Direct Spray-On 300ml Waterproofing For Wet Weather Clothing

Your raingear could be soaking up water just because it is dirty. First, try cleaning it with Nikwax Tech Wash®, and if it is fairly new, or recently re-waterproofed, the Durable Water Repellency (DWR) will be revitalised just from cleaning.

eBay