You will find that Gildan makes a great base for layering under flannels or jackets.
Men’s 100% Cotton Tank Top A-Shirt Wife Beater Ribbed Undershirts Size: S-4XL
I like that the round neck is neither too high nor too low on the chest.
Hanes 10-Pack Men Tee T-Shirt ComfortSoft White Crewneck Undershirt Short Sleeve
Hanes t-shirts are perfect for lounging around the house or running quick errands.
Hanes Men’s White Crewneck T-Shirt 6-Pack Undershirt Tee TAGLESS FreshIQ Comfort
A nice touch is how Hanes pre-shrinks the fabric so your size stays the same.
PRO CLUB HEAVYWEIGHT T SHIRTS PROCLUB MENS PLAIN SHORT SLEEVE BIG AND TALL M-7XL
What stands out about the crewneck is its clean line around the neck area.