The N-Line is Rex`s new race line of fluor-free grip wax to replace the fluoro Pro-line waxes. These waxes are designed with Dual Compound technology, perfect ratios of pressure-sensitive and temperature-sensitive materials, and N-Kinetic technology, for glide and dirt repellence. The N-Line waxes are great on their own or as mixers and covers. N31 is hard, cold weather grip wax for crystallized, aggressive snow. It is best used in -8°C to -20°C. As most green waxes do, the N31 has awesome glide properties which makes it a good choice for topping and speeding other waxes up. It still has enough grip to use alone on colder days.