The Granite Gear Lutsen 45 provides comfort and fit innovations, allowing hikers to quickly adjust to a perfect fit, even when on the trail. Besides the convenient ease of adjustability, the Lutsen provides superior load-transfer capabilities to the shoulders and hips. With the Re-Fit system, hikers will be able to go farther, more comfortably. From stretch side pockets and water-resistant zippers & fabrics, to conveniently-placed hydration ports and compression straps, it’s all there. The most important aspect of the Lutsen 45 is the innovative Re-Fit Air Current suspension system, which offers a custom-fit for a wide variety of body types. Perfect blend between ultralight and custom fit smart weight.