The Pyro Putty Winter Blend Fire Starter is designed thinner specifically for cold temperatures. One nickel size piece of Pyro Putty can produce a 4 to 6-inch flame that will burn between 6 and 10 minutes. Because you are using such a small amount each time, you can make up to 20 fires with just .5 oz. You can also use Pyro Putty to mark trails by exposing it to UV light to make it glow in the dark and because of its waterproof feature, you can use it to repair leaky tents or even waterproof shoes.FeaturesWaterproof and weather-resistantQuick ignitionCan repair leaky tents and shoesGlows in the dark