The link says the tyre is not available.
Some tyres have a wire bead, in other tyres, the bead is made of kevlar or some other flexible, plastic-like material, whcih enables the tyre to be folded so carrying a spare one on the bike is much, much easier.
Folding tyres are slightly more difficult to mount on rims because they tend to flop around a bit.
I've used Innova tyres from Torpedo7 in New Zealand for commuting on an old MTB over smooth and rough gravel roads. Here is a link:
http://www.torpedo7.com.au/products/...ture-resistant
T7 often has these discounted to $9 each, and I'll order four of them at once. Postage is pretty cheap and time to delivery is about a week.