It's expansion exercise strap. I think sergeant knows it better, but anyway.
I don't know that's particular strap, but as far as I read expansion exercise and tried few trainings, it's basically bodyweight training support and enhancement. It was really fun and can be very effective.
I was seriously thinking about it, but passed this time. I wanted exercise outside and realized it's difficult to find ideal place to hook strap. Even though it can be hooked anywhere, I think ideal hight is chin up bar, and floor/ground should have enough clearance not touching anything. Even in a house, setup can be pain.
You can still do more than enough exercises even if the area is limited, and I will get it if i can find ideal exercise space, but you might watch few youtube video and see if it really fit your exercise goal first.
Edited by: CHIHAYA at: 7/30/2012 (23:47)