snowflex is quite common in the UK where i'm from as we just dont get any snow!
It wont damage your board really, not as long as the slope is kept in good condition. Damage will normally happen when its not in top knick and there's nails and wood etc coming through on the poma's.
Its alot more difficult to ride than snow, your technique has to be spot on, but once you master it snow will be a peice of pi$$!
ride in old jeans, not your best pants
it can be ridden properly though....
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