'one size fits all' external immersion suit does not fit you if you are 6'5"
Reminds me of the story cosmonaut, Alexei Leonov, tells of the opposite sort of problem when his space suit expanded so much that he couldn't get back in from a space walk and then his hands slipped out of the gloves so he couldn't manipulate anything.
ISTR that, without referring to mission control, he managed to depressurise his suit a bit and made it back.
Sea survival content? Ummm - the vast sea of space
