Individuals running with a transfemoral prosthesis, regardless of technique, will typically battle with sweat and proper socket fit through the duration of the activity. Running with a prosthesis is difficult enough, so adding anything additional to wear is not optimal, but this one extra piece is worth the weight! Transfemoral sockets tend to twist around the residual limb with the addition of sweat, regardless of the type of suspension. Adding a groin support belt will decrease the amount of twisting available in the socket and allow the runner to increase distance before adjustments need to be made. Prosthetists often have the ability to order these neoprene belts, but you can also find them on Amazon at a very reasonable price. Be sure to add this to your running bag before you hit the road!