When new, the water repellency gradually increases as the use of clothing that repels water droplets like a ball is repeated.It will decrease.Wear with reduced water repellency obstructs ventilation, causing moisture to condense inside.In the end, the inner wear worn underneath will get wet.This product ensures breathability and provides strong water repellency.With one treatment, it can withstand several washings and the effect lasts.For washing, please use NIKWAX Tech Wash Detergent (sold separately) that does not leave laundry residue.For breathable waterproof jackets such as Gore-Tex, Sympatex, and Entrant.You can use it with confidence.Suitable for such wear and gearVarious types of 3 layers (Gore-Tex, Diaplex, Sympatex, etc.) Breathable waterproof wear.Acty vent, windbreaker such as deer light, pants, etc.A sleeping bag made of breathable fabric, etc.How to use : (1) First, check the washing label to see if the clothes can be washed.(2) Close all velcro, zippers, buckles, etc.(3) First, wash the clothes clean with NIKWAX Tech Wash Detergent (sold separately).Rinse thoroughly.(4) Do not remove the clothes from the washing tub, but store water in the washing machine using the table below as a guide.(5) Shake the NIKWAX Direct Wash-in well and put an appropriate amount in the washing tub.(6) Wash and rinse.(7) Dehydrate and dry according to the washing instructions on the garment.