Carpet on Concrete Basement Floor

Hi all, wife and I are trying to add carpet to an unfinished basement just to make it look a bit nicer and be somewhat encouraging to go down and use the space more. Nothing major.

We bought a large group of low-pile carpet squares that we plan to put down. Do we need something underneath?

Basement has never had moisture problems, does get a bit humid down there during the hottest parts of summer.

I was considering putting down the underlayment below but was wondering if anyone has cheaper/better options and/or if they think it’s needed. Thanks!

AirGuard 630 sq. ft. 40 in. x 189 ft. x 2 mm 5-in-1 Underlayment with Microban for Laminate and Engineered Wood Floors