I have read this M.A. question: What are the ways to get sweat stains out of a Gi? My gi is at least two years old (probably a lot older). It is an Adidas J800 (do)gi. It is 30% polyester (800 g/m² ...
I find even with things like Napisan etc my Gi ends up with stains around the neck and Sleeves. Are there any ways to keep it pure white?