My Wife uses the medium square shaped airhawk on the rear when we are riding two-up, and I use it sometimes for solo rides of more than one day. The longest trip thus far on the Ten was Paris to the Arctic Circle and back - 7,000km over 21 days last summer. For my significant other it was a bum saver and certainly worth the investment for the comfort. I purchased it from the European distributor in Sweden via direct money transfer. No problems.

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"Never mistake knowledge for wisdom. One helps you make a living; the other helps you make a life." Sandra Carey