It's called "Soothing Muscle Gel", made by a company called Feierabend. This stuff rocks. I've been using it for a few weeks. I put it on before I work out & it's like an instant warm-up - it gets hot fast. It's different from any other creams or gels I've tried - it's like it makes your muscles "breathe" (I know, I know, stupid analogy, but it's the only thing I can think of). They've got links to T-Nation & Biotest on their web site, so I don't know if others have tried this stuff, but I definitely recommend it if you want to try something new.