Made for use in colder environments than the Original BUFF was intended, the Thermonet BUFF is some four times warmer than regular microfibre, but still lightweight and versatile. The multifunctional BUFF tube scarf can be used while running, hiking, climbing, skiing, biking or motorcycling, and turned instantly from a scarf into a headband, wristband, mask, hair-band, balaclava, scrunchie, saharaine, beanie or bandana, as required. The Thermonet BUFFs higher thermal properties come from the addition of PrimaLoft, a super yarn developed for the US army in the 1980s that retains its insulating effectiveness even when wet. The Thermonet BUFF weighs 61g & measures 50cm l x 23.5cm w.