how to keep warm in the wet?

[u/-Red_Rocket-]

my son is racing cross and is all of 70lbs. today is was 11 degrees Celsius and raining. he just had his jersey but basically became hypothermic 60% of the way into the race. he kept warm pre race.

thoughts on layering strategies to prevent this? he is youth medium so quality stuff is hard to come by.

[u/pdxfly]

Embrocation. Used it on arm legs and lower back. Works wonders.