High altitude butane

[DumpsterPooh]

I use this also, and found it to be the best.

Probably the last worthwhile product from Xikar.

I saw this on Mercatorgear.com
“ At sea level, pure butane struggles to maintain gas pressure a just a few degrees above freezing. At 9,000ft (e.g. on the John Muir Trail), the evapouration point drops to -8.5oC. On the summit of Mont Blanc, you can use butane down to -14oC, and at everest Base Camp, -17oC.”

Not sure how accurate their answer is or how reliable the information is on that website…