They seemed to be too stiff as I tried to bend and flex them before trying them on. That changed immediately as I slid my feet easily in and laced them up tightly. It felt as if they molded themselves right around my feet and my first few steps were comfortable and effortless! I mowed the lawn the next day and for a change, finished with no blisters or callouses! These are the only boots ever that fit me so perfectly! The perceived stiffness seems to be in the right places as it feels like my posture is better with the support they give me. I've worn these everyday for almost 2 weeks and as comfortable as they are there is no need for a break-in on these.