I have had probably 10 pairs of Merrell's over the years and it's all I will put on my feet. I had a problem with a pair of boots and these were a replacement for those. Merrell customer service is second to none they are by far the best. I wear these boots for at least 10 hours a day and many days longer than that. I use them indoors and outdoors in all kinds of conditions rain,snow mud and on concrete. I climb ladders and on roofs and under houses in them. They seem to have a good grip on all surfaces I have used them on. At the end of the long days in them my feet are dry and comfortable. Thank you Merrell for a good product again. And once again for the wonderful customer service I wish other companies I've dealt with were as good as you.