My "index" toes tend to overlap with their neighbor toes, resulting in frequent blisters on or around the index toes. I found a gel-filled toe cap at my local drugstore that I put over my index toe that eliminated blisters for me. There are foam ones also, but they take up more volume and don't last as long. The gel-filled cap was stretchy and comfy, although expensive at $5/cap. My feet perspire a lot (actually they sweat like a pig), but I'd estimate that these caps would last 2-4 weeks before needing replacement.