Once he receives the furniture he’ll see the value in rugs, aesthetically and practically. Common sense should prevail, and anyway it’s probably best to get the rug(s) last. Size of rugs is critical too, which for someone furnishing a first home is hard to comprehend.

What your are looking for are non slip furniture pads. They do exist. Amazon has some.

I agree Amazon has tons of non slip and I will say usually the sound is the issue with no rugs or soft surfaces but he will not know that until he moves in .

Thanks all! I did look at Amazon previously but your comments helped me get better results, which may come in handy once his furniture arrives and he decides rug or no rug. It’s his place, so I try to guide but let it be his decision in the end. That said, I have stressed how hardwood floors and furniture don’t always get along!
Appreciate the comments and guidance.

I would recommend getting one that is low voc or "non toxic." there can be a lot of toxins in products like that. Just fyi

MOM. He is a grown man. Let him do what he wants. If you really feel like you need to save him, get him some of the floor protectors and leave it at that. If he ignores your loving advice, he ends up with some scratches on the floor which are pretty easy to fix. I hesitate to say “and he’ll learn to listen to you,” because our kids don’t ever get to that point, do they?

JD is the pot calling the kettle black or did I misinterpret your design comment on the rug/floors?

me giving advice on what kind of DESIGN ITEM to buy is on topic

Some condos require a certain % of the floor to be covered if you have neighbors below you.

Have a multi-bedroom house, and love the walnut hardwood floors so much - no rugs*, much easier to keep clean!

*Have a small rug next to the shower.

btw, my sofa & chairs do not "glide too much" and have not damaged the floors.

I live with a couch flopper, so here's my experience:

first of all, those fuzzy felt feet for the dining room chairs tend to fall off. get the 3M ones, they last a lot longer.

for the living room, whether he puts in a rug or not, he'll need rubber grips since he's a "flopper". (my couch used to even scoot on the rug.) if he has a couch with skinny legs, the stick-on grips will 100% not stay on. he'll need to install the screw-in ones, like these (make sure the screw can go in deep, or it will poke out and scratch the floor). or caps like these. if he has a couch with really thick legs (like 3" wide), then sturdy stick-on pads will be fine (like these).

if he's worried about keeping the rugs clean, consider Ruggable. if he doesn't like that brand, then get whatever is thick enough to not rumple up easily. for grip: Ikea's STOPP anti-skid underlays have not damaged any of my own hardwood floors.

if he still does not want rugs, so be it. but a couple of things to advise to him: hardwood floors can be loud even if they're well built. especially if he is a flopper, or if he or any of his guests happen to be heavy walkers.

I also think it's kind of gross to not have any rugs. even though I vacuum weekly, I still pick up a little dust and stuff as I walk around. I like to have something to swipe my feet before I put them on the couch or in bed.