Bests & Worsts Reviews from Amazon

I have been purchasing the JMS cotton briefs for years. Never in the past have I had an issue, but like other Amazon reviewers, I am most disappointed since these DO shrink when washed. Not just a mere amount. I purchase them larger in order to accommodate medical reasons and having these shrink as they did, really creates a problem that I had not had in past JMS panty purchases/uses. The older ones I still use are still retaining the size, and shape even after multiple/many washings. I am wondering if these are KNOCK-OFFS and NOT genuine Just My Size items... if not, then JMS has really sunk LOW in their quality!