Having a boot design with no bend but squishy rubber i dont think exists. Jus sayin. Clarify dosnt bend? Full shank? 3/4? Your boot design in your mind i doubt would lend well but who knows? Design it… i didn’t care for the ankle design in the la sportiva so im sticking with the scarpa ribelle hd. Wish salomon would make the x alp gtx again but with a better gore tex liner. Thats the best high country boot for my liking. Stiff tortionally to sidehill for miles yet flex and feel like a pillow on various terrain but climb like they belong and lead the way also edge well and move fast yet light. I try many boots each year and yet to find better. Good luck let us know what you find.