This shirt uses moisture wicking fibers to help you stay cool during hot days.
Under Armour UA Tech 2.0 Short Sleeve Shirt Mens Size Medium Blue NWT New
A crew neck like this one sits comfortably under sweaters or cardigans.
Lululemon Metal Vent Tech 2.0 Gray Crew Neck Long Sleeve Running T-Shirt XXL 2XL
What stands out about the long sleeve version is its thoughtful sizing.
Lululemon Metal Vent Tech 2.0 Blue Crew Neck Long Sleeve Running T-Shirt L Large
You will find that the long sleeve style makes this a solid layering piece.
Babe Ruff Ruth Baseball Call Shots Big Dogs Tee Shirt White 4X 5X 100% Cotton
With short sleeves, you can move freely without fabric bunching up.