I am very pear shaped, so the men's FR pants my company supplied weren't working for me. I've tried both these and the denim style and they work a lot better.
I like these a lot better than the denim variety. My only complaint is that there is a snap instead of a button at the waist. These gap a lot less in the back than the denim and they look a lot better too.
I would recommend ordering a size up. I usually wear a size 16 and the 18's are a bit snug on me.
I have found these canvas jeans to be a lot more comfortable to wear in the summer months than denim jeans. They tend to dry out quicker too, whether it be from sweating or wet from rain. Before purchasing the canvas jeans I had always worn the denim Carhartt Dungaree jeans. The only problem I found was in how the two different types of jeans fit. I had to go up two sizes in the canvas jeans. For example, I wear a size 6 in the denim Carhartt Dungarees, whereas, I have to wear a size 10 in the Carhartt canvas jeans
This is the second time I've bought these pants. They are comfy and lighter than the jeans, but they do run small. Both times I've had to order one size larger than I do with the jeans (one size larger than my normal pant size). They are also a bit more roomy/baggy than the jeans in the legs. I like the extra utility pockets on the sides.
These are by far the most comfortable FR pants that I've found thus far, I've tried other Carhartt and Wrangler FR jeans and none are near as comfortable. That being said, I have several issues with these pants. My biggest complaint is that the inseam options are terrible, I purchased a size 2 with the only option being 32" or shorter. I'm 5'9" so when I sit down these pants look like high waters. When standing with boots they're only marginally acceptable. Carhartt needs to offer more inseam options for every size. My other qualm is that the sizes are not small enough, I fit into a traditional size 2 and the Carhartt size 2 is way too large in the waist. The pants, while comfortable, are also not flattering in the slightest. I do not have a backside in these pants at all. I would recommend these pants to others but only because they are very comfortable, not because they look good or fit well.