Check out my sponsor Brilliant, free for 30 days (and get 20% off a premium subscription!) by using this link: https://brilliant.org/nighthawkThe most useful...
In hot weather, I use silica gel neck wraps, which slowly release water to keep you cool (if soggy). I really want to try making an equivalent out of sodium sulphate gel and see how it compares.
In hot weather, I use silica gel neck wraps, which slowly release water to keep you cool (if soggy). I really want to try making an equivalent out of sodium sulphate gel and see how it compares.