A nice touch is the short sleeve cut, which allows for a full range of motion.
THE UGK Super Tight GIldan T-shirt Size S-XL Black Color
The unisex sizing here is consistent, so order your usual size.
Pro Club Men’s Heavyweight Cotton Short Sleeve Crew Neck T-Shirt (More Colors)
You will appreciate that Pro Club shirts hold up well to frequent washing.
Pro Club Men’s Heavyweight Plain Cotton Short Sleeve Crew Neck T-Shirt Big Tall
You will find that the white shade pairs beautifully with denim in any wash.
Perry Ellis Portfolio Men Shirts Multiple Color & Sizes
A crew neck like this one feels broken-in from the start, no stiffness at all.