Hello, my first post and looking for advice. I am using Helios Marathon LOX flasks and finding that if I sling it over one shoulder as I tend to do when just going for the paper then I get very cold area just around my kidney area because the flask is very cold. Not much better when worn as backpack with both straps. Anyone have experience of this ? Maybe I am doing it wrong. Grateful for any thoughts.
best wishes
patiopot