This jacket is 100% waterproof. What’s more, we haven’t skimped on the details either; plenty of sealed pockets, a zip and popper fly and a chambray lining. It also comes with leather detailing to add a touch of luxury. The taped seams make it waterproof by stopping the water coming in through where the seams have been stitched, leaving it perfectly dry in seriously rainy weathers. Happy (rainy) days!REPROOFING A WATERPROOF JACKETWe recommend you reproof our jacket a couple times a year dependant on its usage. This is due to the nature of the coating which becomes less effective over time as it is affected by dirt and abrasion. We suggest you keep your waterproof clean and reproof it periodically to keep it feeling like new.How to tell if it’s time to reproof:The best way to test your jacket is to pour some water on it. If it is working effectively, the water will ‘bead up’ into droplets. If it has degraded, the water will soak into the top layer of the fabric and ‘wet out’, making the fabric look darker. If this happens, it’s time to reproof. For light usage, you should expect to reproof your garment 2 – 3 times per year. If you use your waterproof for intense exercise (hiking, biking, running or climbing) you should expect to reproof more frequently.Treatments:There are lots of different products on the market which can be bought online or out outdoor retailers for your reproofing needs. Nikwax Tech Wash and Grangers are great products which can be washed in or sprayed on following their instructions.