Nikwax Unisex's Cotton Proof Waterproofer for Canvas, Transparent, 0.3 Litre

DescriptionEasy to use WaterBased waterproofing which improves water-repellency
of cotton,

polycotton and canvas clothing and equipment. - Adds Durable Water Repellency -
protecting the insulating properties of fleece from wet and damp conditions -
Quick and easy to apply in your washing machine at home - Maintains
breathability - Develops full water-repellency without tumble drying -
WaterBased, non-flammable and fluorocarbon free The easy to use, safe, high
performance, wash in waterproofing for cotton, polycotton and canvas.