It depends on the length. The shorter, the less flex, but the range is 4-6 / 10. The 148 Narrow board is pretty stiff, and the 159 Wide is a bit more flexible. Check out the lib site, They have the specs for all their boards. Here is the banana page.http://www.lib-tech.com/snow/snowboards/skate-banana/

its a fairly flexible board..i have the 156 and its pretty flexible, to compare it to other boards i would say its somewhere close to the 2010 K2 Parkstar in flexibililty.