My dog is a total furnace in summer, but the adjustable girth on this harness lets me get a perfect fit without any chafing. The mesh really does stay cool against her chest even on hot walks, and it's light enough that she forgets she's wearing it.
The mesh is so breathable that my pup stopped panting on our morning walks, and the double adjustment points let me get a snug fit without any chafing. It's held up great through three washes already, still looks brand new.
My dog usually hates wearing anything, but this mesh harness went on without a fight—the soft fabric doesn't snag his fur at all. The neck and girth adjust separately, so I finally got a snug fit that doesn't twist around his chest during our walks.