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This is true and it comes in med soft and med hard. 47.5 and 42.5 I think if my memory serves me right.Aurora is not tacky. It's completely untacky.
It has a fairly sturdy topsheet, so I think it will last a long time. This rubber is fun to use after boosting, so I was ripping heavy shots nonstop for 2 months. It still has 90% of its grip and is till in prime condition. I wouldn't be concerned about durability.