The Hypersphere Mini by Hyperice is a vibrating self-massage ball that’s well designed and efficient for precise bodywork, both at home and on the road. It’s slightly smaller than a softball and weighs just one pound, so it would fit fine inside a carry-on (and is TSA approved for that) and also wouldn’t make much of a dent in a checked bag. Not only would it be handy for pre- and post-run self-massage, it may also nudge me to spend a little time on my legs and glutes at the end of a long travel day, which never fails to leave me feeling stiff and tight. New with original packaging. Sealed. Never opened.