The TFX Summit 6515 Backpack by Lowe Alpine has some of the most comprehensive test programs regarding its suspension, fit and torso motion on the market. The TFX suspension system centers around an offset-V configuration using a continuous aluminum stave. The stave itself uses an advanced honeycomb internal structure to give greater strength with less weight. Comfort is improved when a backpack accommodates the body s natural movement, and the development of Torso Motion allows TFX packs to flex naturally with the body. The Torso Motion system allows a carefully calculated degree of movement in harmony with your back, yet does not compromise balance. The hipbelt allow the hips to move relative to the spine, while maintaining stability. At the same time the internal frame is designed to flex and rotate with the natural motion of the torso. The Torso Micro Adjust facility on TFX 9 back systems customizes the back profile to the individual s lumbar curve. This innovative solution adjusts the pack lumbar pad in a similar way to car seats, offering adjustable support. This allows you to custom-fit the pack perfectly to your back, by squeezing or releasing the hipbelt-mounted bulb. It also allows adjustment in action as your body adapts to changing terrain, or as you add and remove clothing.
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