Hello, I' m here in Texas where humidity is very high (85 & 90 per cent daily) and I haven' t had a problem, as long as they are sealed. I get mine from Whispering Wind Arrows and his email address is [email protected] no website. And I get shafts from Paradox Archery Works, his email address is [email protected]. Both these guys make their shafts and I' ve got nothing but great shafts from the both of them.