Eating a bowl full of soggy shredded wheat when you're used to a hearty breakfast of steak and eggs can be, well, dissatisfying, and something similar can be said of ski boots. Switching from beefy freeride boots to a flimsy pair of backcountry shoes can definitely throw you off your game, and leave you wondering whether or not the line was worth the effort. Fortunately, K2 has developed a line of boots that will devour everything from steep lines in the resort to sphincter puckering backcountry couloirs. Coming in with a 110 flex, the K2 Men's Pinnacle 110 Alpine Touring Boot is the medium flex option in K2's Pinnacle line and sports a moderately wide 100mm last, making it a good option for the skier that prefers a more comfortable fit and a bit more forgiveness from their boots, but still wants to able to rally when the chips are down.While the Pinnacle 110 may be a bit softer than its 130 flex sibling, it's still going to offer more downhill performance than most AT boots out there thanks to its Synchro Interlock walk mode and carbon infused Powerfuse Spyne. Instead of using rivets between the cuff and shell, Synchro Interlock technology utilizes a wedge and V notch interlocking mechanism to firmly lock the shell and cuff together once you put the boot into walk mode, so you don't get that wonky, loose feeling that's a common feature of boots with a walk mode. The Pinnacle also sets itself apart with its versatile soles, which can be switched between tech bindings, alpine bindings, and frame style alpine touring bindings in a single day, without even having to switch out the sole lugs.