I've been a group fitness instructor for almost 30 years. Technical fabrics are GREAT for wicking sweat away from the body. I teach multiple classes every day so I wanted a detergent that would get the smell out of my clothes without changing the color or ruining the fabric. I found WIN and loved it!! I make sure I buy a few at a time so I don't run out!! I'm happy that the bottles are bigger now and last longer because I sometimes wash my fitness clothing every day!