I spend many hours on my feet walking, climbing ladders, stairs, and standing on various hard surfaces to support the construction of US Naval Submarines. These Dover's are by far the most comfortable Keen work boots to date...and I have tried them all! The quality and craftsmanship is superb which I've come to expect from the American Built line of Keen's. These are considerably lighter with the carbon fiber toe. These come standard with the K-20 insole installed vice the usual K-10 insole which is the standard in all of the Keen's that I've had. So, with the combination of the LuftCell sole, the K-20 insole, the Konnectfit Heel, and the amazing craftsmanship, these boots are extremely comfortable and hug your feet right out of the box! Keen, please continue to manufacture this boot and only improve on it as you see fit from feedback!