Interesting answers to the question of what to wear. Now I'll give my opinion
No matter the weather, jeans or other sturdy pants are best...just think of the walk around, getting on the ground, perhaps in wet grass or such...then climbing in and banging the legs on something sharp...rather suffer just a blue mark and not a bloody scrape.....they of course should be comfy. On very hot summer days, then perhaps shorts, but bring along an overall that you can wear over it, just in case, if going on a longer flight. Being a girl, I would love to wear skirts sometimes, but out of practicality prefer not to
nice cotton t-shirt, polo shirt or blouse/shirt is fine...either short or long sleeved....bring again the overall or leather/cotten jacket...those nylon imitation flight-jackets I would not recommend, as mentioned before, because of fire hazards...(I should mention, that I am also a hot air balloon pilot and thus have a great respect for flames
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above all: comfortable shoes!!!! sturdy tennis are the best for me...
do your instructors in the UK really wear black trousers and white shirts? how terrible! here we run around just like the students...ok, I teach in a club and not at a commercial outfit...
I'll never forget going for a balloon ride at a commercial outfit in the US...when I saw the pilot appear in dark blue trousers, white shirts with 4 stripes on his shoulders I had difficulty to keep from laughing! sorry...but that's overdoing it a bit I think.....
ok..that was my opinion...
keep flying...
WestWind