Amazon.com: JDGFF Invisible Seat Leg Brace Magic Stool, Wearable Portable Seat Lightweight Chair, Metal Folding Fishing Chair for Music Festival Concert Subway Bus, Bear Up to 330Lbs ( Size : M/160-170cm ) :
Amazon.com: XYQSH Invisible Seat, Magic Show Invisible Chair, Portable Folding Chairless Support Wearable Chair, Exoskeleton Seat, for Outdoor Fishing Concert Subway Bus, Weight Less Than 165 lbs : Everything Else
You can take a seat anywhere with this wearable chair - YouTube
Akar Chair Atelier Pendhapa The Invisible Collection