Nikwax SoftShell Proof Wash-In is easy and quick to apply in a washing machine, and its highly Durable Water Repellency (DWR) develops on air drying. The washing machine application ensures that the treatment goes right through the garment, treating seams, tapes and cords, as well as the fabric. Also, as the need for tumble drying is removed, this saves energy and protects more vulnerable, older, garments from heat. Nikwax SoftShell Proof Wash-In has been specifically designed and optimised for softshell garments; it leaves a flexible water repellent treatment on individual fibres allowing moisture vapour to pass through, maintaining breathability.

Nikwax SoftShell Proof is a safe product to use on softshell fabrics. It is WaterBased, non-flammable, contains no harmful volatile organic compounds (VOCs) and is fluorocarbon free. Nikwax SoftShell Proof has been specifically designed and optimised for softshell clothing, providing Durable Water Repellency (DWR) whilst maintaining breathability. Nikwax SoftShell Proof requires no heat to develop its DWR, so it is not necessary to use a tumble drier for best results.