The Ninja Suit by Airblaster makes a great base layer.
Just try one on and you'll see what I mean.
DAMAGE-1904 W. Superior St, Duluth MN 55806 / Call: 218-724-4027 / Mon-Fri 10-7 Sat 10-6 Sun 11-5
DAMAGE-1904 W. Superior St, Duluth MN 55806 / Call: 218-724-4027 / Mon-Fri 10-7 Sat 10-6 Sun 11-5