I'm preatty exited I place my order for the x4 lab extender I can't wait till it gets deliver. Anybody in betterman owns and x4, if so can anyone share their feedback and gains on ther product. Thank you
Finally got my extender and I gotta say I love it I just got out of work and I've wore it for 7 hour so far. One thing I find the cylicone tube more comfortable than the straps.