Pouch Waist

What are those pouches that football players have around they waist?

I realized just now that football players have these pouches around their waist that have smoothing in them, I have been watching football for a long time but I have just realized it a few days ago, I unno if it in the NFL , but I see it all the time in the cfl and cis college football.

Handwarmers, hence you see them more often in the CFL and CIS than in the NFL.

airsoft: hunter waist pouch and loadout