An unbranded tee like this one is ideal when you want no distractions.
Neon Genesis Evangelion Anime Retro Washed, Oversized Printed T-shirt, Japanese
Short sleeves give this tee a sporty feel that works for casual meetups.
God Enel OP Lightning Graphic Apparel: Vintage Washed Oversized T-Shirt
You will find that the short sleeve style pairs nicely with a baseball cap.
3 PACK Men’s Pro5 Short Sleeve Plain T-Shirt Super Heavy Weight – S_3XLT
You will find that this solid tee holds its color well over time.
3 Pack Of Hanes 5180 Unisex Plain Blank Casual Beefy-T Shirt Stylish T-Shirt
A nice touch is how Hanes keeps the seams flat to prevent any chafing issues.