A simple and lightweight bit of kit, consisting of a single vertical tape strap which attaches to the back of the sit harness (uses a plastic quick release buckle). At the top it joins with an easily adjustable buckle which passes over the shoulders and joins on to the top hole of the chest jammer. The image should clarify!
Some people (especially women) like this as it does not press on any sensitive bits, while still being supportive. It also allows a 'crunched over' on-rope prussiking position, to be changed to a more upright posture quite quickly.
NOTE that the Torse seems, anecdotally, to fit less well those with long backs. If in doubt, contact us to talk about it!