<span style="box-sizing: border-box; font-size: 16px; font-family: 'Google Sans', Roboto, arial, sans-serif; color: #202124;">Many professionals insist on using ice fishing line, however. So what's the difference? Line memory is a major issue that ice fishing lines are designed to prevent. Ask any runner: It's much easier to stretch and get loose when the temperature is warmer.</span>