T-shirts, compression shirts, padded shirts, and flak jackets are all viable options for clothes to wear under pads for football.
Do Receiving Gloves Help You Catch a Football? - SportsRec
3 Ways to Choose and Wear a Protective Cup for Sports - wikiHow
What to Wear Under Pads for Football - SportsRec
Rules for Field Goal Kicking & Pads in High School Football
Football Tips & Equipment : How to Put on 7 Pad Football Pants
Shoulder pad (sport) - Wikipedia
Undercover product offers another first for Florida-Georgia series
Why Use a Football Neck Roll? - SportsRec
What to Wear Under Pads for Football - SportsRec
Football Back Plate Lower Back Pads for Football Players Rear
Knee Hockey Rules - SportsRec
What Clothing Is Typically Worn for Playing Volleyball? - SportsRec