Hello,
The aftercare instructions for this item does not state that the garment needs to be re-proofed after washing. It would be up to you whether you would reproof.
However, if you believe the level of water protection on the coat is fading you can treat the coat with something like Fabsil, which will give the coat a fresh waterproof coating.
Thanks for using Q&A. [DG]
Answered by: DGIFF
Date published: 2020-10-16