DANISH ENDURANCEMerino Wool Base Layer Men, Thermal Set Men, Long Johns & Long Sleeve Top, Thermal Underwear

Is the size listed us or eu?

Is this skin-tight?

The sizing is very confusing. i'm 6'1"' with a 35" waist and 44" chest. i was thinking l or xl for the top but this equates to 2xl for the bottoms?