Tamrac Sling Strap Stabilizer can be adapted to the Tour, Pro, and Compact if desired. The underarm straps hold the pad securely in place. This can be easily added by using the clips to attach to the strap webbing.
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The Sling Strap Stabilizer did a good job replacing the strap I lost on my Tamrac Professional Camera Backpack. I am very happy that Tamrac has this replacement part. This is the click together strap that crosses my chest and connects the shoulder straps. I lost one side of the stabilizer. Without it the shoulder straps do no stay on the shoulders well. The Sling Strap makes all the difference and is necessary for this back pack design. Makes it possible for me to carry my Laptop, camera, three lenses and accessaries all in one unit on my back.