I've never used Go Lite but a 70 liter pack for 1.15 pounds, you'll be hard pressed to find another pack of its size and weight and current price on the website.
Warning - just because it is a 70 liter pack does not mean it will carry weight. A friend of mine had about 35 lbs in hers, it was a miserable trip for her. Make sure that 70 liters is bulky and *light* if you try it.
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