With my new Macbook Air, I also got a new bag to carry it in. I go through more messenger bags than anyone I know. But I think I found a real winner here.
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For starters it's very small and unobtrusive, unlike my previous bag.
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Tom Bihn logo. The fabric is a durable canvas.
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A giant heavy duty single handed buckle.
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The back has a slanted pocket for quick access to papers or magazines.
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The back also has an adjustable waist strap to keep it from bouncing around.
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The inside is a brighter orange color, which makes it easier to find things rolling around inside.
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The 11 inch Macbook Air fits perfectly into it's padded compartment.
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There are 6 rings inside, you can attach your keys or anything to them.
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I went ahead and got the 'Absolute Strap', I highly recommend it. It's soft padding on the shoulder with a textured side so it doesn't slip.
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With heavy duty metal clips.
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It's not really made to carry a lot, They claim it's only made for the laptop, phone, and a notebook. But I fit all of this in comfortably.