What I realize about Kerastase is that is leaves my hair feeling natural and clean, not sticky like the others. Additionally, in blow drying my hair. I noticed that it did give it a fullness and definition that other mousse did not. Kerastase helps to create as close of a full body blow out as I get from my salon. And, as I've been using Kerastase for the past year. As it is currently winter. In experimenting with other mousse, I realize Keratase never created the fly aways that other brands to. I am now dependent, annoyingly, as it is a great product that's kind of expensive.