Sexwax Quick Humps surfboard wax formulas are the "go to" choice for professional and experienced surfers around the world, now packaged in recyclable paperboard boxes. X- Cold for 58ยฐF and below 1X EXTREME SOFT Cold to Cool: 48 F to 68 F 2X EXTRA SOFT Cool to Mid Warm: 58 F to 74 F 3X SOFT Mid Cool to Warm: 64 F to 78 F 4X FIRM Warm to Mild Tropic: 70 F to 84 F 5X HARD Tropic / Basecoat: 78 F+ 6X EXTRA HARD