I can't imagine, unless you are trying to use a p.o. Box # They ship from the UK, so they can't use US Postal Service, so they ship FedEx or UPS. Neither FedEx or UPS will deliver to a P.O. Box
My brother just tried this site for the boots as well, it said they could not ship to him. So he emailed to find out what was up. They said that because of an agreement with Salomon they can no longer ship those to the US. Kinda sucks cause that was a great price!
So, after 3 months of wearing them daily, they are still super comfortable, no hot spots, and look new. No separation of any stitching or sole lamination. No signs of wear on the sole, and I mostly walk on concrete at work. I spray them at least once a week with the Kiwi Protect-All waterproof spray which keeps them looking new (recommended by Salomon). I really like them, and will buy another pair as soon as I can find them on sale.