Real EssentialsReal Essentials 5 Pack: Men’s Short Sleeve Dry Fit Active Crew Neck T Shirt - Athletic Running Gym Workout Tee Tops

What is the length of the shirts?

Ordered for my son, he's 5.8 tall i guess about a large xl to xxl as he likes things baggy i ordered 3xl as some say there tight? will they be ok?

I am unfortunately a very sweaty person even in cool weather, does it really help or is it a gimmick?

Size fit 5ft 8" 38 - 40 chest.. recommend size please.. athletic muscular build.. but dont want tight fit. :)