I have no experience with wearing sleeves, but after signing up for the Javelina 100, a 100 mile trail race through the desert, I wanted something to keep me cool. I wore this product from mile 0 to 60, so roughly 14 hours of the day. Not once did they get uncomfortable. While I heard others complaining that shoving ice down their sleeves, it was uncomfortable having the ice directly on their skin, I did not have this problem because of the 2 pockets on each arm. I kept each arm pocket fully loaded with ice all day and it worked out perfect! I even got a few compliments from people at aid stations that were helping me out that said they liked the pocket feature as opposed to other brands that didn't have pockets. I highly suggest this product and will be using them again should I be lucky enough to get into the Western States 100 this coming year!!!