your facts about the tour guide exam last november are not accurate or appreciated by those who failed. urine, too, can be a problem—although there is little that can be done. i got them a little big to allow for the summer swell and i think it will be perfect. sure enough, when the dust settled, only dirt remained. thank you for your interest and we look forward to working with you! i can honestly say that travel is at the core of my learning to love yoga. made of super high quality material, made to last. the late-night testing never fixed the machines. 