The Vargo Titanium Triad XE is a dual-fuel (alcohol / fuel tab) stove. The XE was designed for weight-conscious backpackers that recognize the advantages and disadvantages of burning denatured alcohol. Specifically, denatured alcohol does not burn as well in high altitude (generally over 11,000 feet) or very cold temperatures (below 20 degrees F). In these situations burning fuel tabs is recommended. Manufacturer and retailer of lightweight backpacking gear. Satisfaction guaranteed