What is the diffrence between 1mm and 2mm rash guards??

Question

yea i know it means one is thicker than the other. but is it a big deffrence or not??

which one would be better for a san diego surf 1mm or 2mm??

Answer 1

it depends on how cold the water is the thicker it is the warmer you will be

but the thicker one may give you less flexibility but 1mm thicker will not make much difference but the 2mm may last longer and give you more protection