Had a scary heat exhaustion event yesterday. im wondering if the nema jewel (full chamios/lycra inner with nylon shell) shorts i was using might have contributed. Do coverage shorts in fact trap heat in comparison to lycra shorts or lycra shorts with a pair of light walking shorts over them.

This may seem kinda far fetched but i'd really like to circumvent having this happen in the future and am not counting anything out at this time.

Can anyone recommend a lighter/airer short? I have a pair of nasbar sierras which seem real light but im still trying to get used to the funky liner/chamous.