The break in period was very easy compared to some other boots I've worn.They are really comfortable not as light as my danner gtx but for long term standing feels like pillows underneath me. Definitely recommend for those doubles working the tiers. Only thing side zippers sometimes get stuck but easily fixed running your finger inside of the zipper as you pull them up or down.1st day wearing boots ...... so far soooo great ....... after being on my feet for an entire shift (10hrs) my feet were feeling great. There was no break in period as the material and the soles were very flexible and I must say Rocky has made a great boot in this one..... I’ll be buying a second pair for sure to wear away from work.Fits as expected, so comfortable! Like a pair of great leather gloves for my feet! Love the style, color, feel, fit and ease of putting on. Best black boots EVER!!! Love them!!!Great bootI used this boots for work in law enforcement and the one I received are not good for my uniform!!Su comodidad su peso se ajusta muy bien Te hace sentir seguro en cuál quier trabajo que desempeñes o en el cualquier terreno que andes ?