depneds, on my boots (dalbellos) the flex is altered with how tightly the boot is buckled. if im jumping or really skiing, i crank them down fairly tight. if all im doin is jibbin, loosen those suckas up for mad amounts of flex. nosepresses, butters, brokens, royales, soo much easier with the boot opened. skiing switch is better too, cause it lets you bend your legs a ton more.