A crew neck design like this one works great for layering under jackets or hoodies.
Gildan (5-pack) Bulk Solid ULTRA COTTON Short Sleeve Blank Tee T-Shirt S-5XL New
This crew neckline is a nice touch for a shirt that feels both sturdy and soft.
5 Pack Black Premium Soft Cotton Blank T Shirts Unisex Crew Neck Short Sleeve
The crew neck here is a nice touch, with a reinforced band that lasts long.
3PACK Gildan Mens G2000 Solid Ultra Cotton Short Sleeve Blank Tee T-Shirt S-3XL
A nice touch is the slight off-white undertone that makes it feel a bit warmer.
Gildan (2-pack) 100% Cotton Short Sleeve Tee T-Shirt S-3XL New
What I like is the crew neck, which adds a touch of simplicity to the design.