Natalie Good quality Gliding Core Disc - I originally ordered these about a couple of weeks ago and they got lost in the mail by UPS. I went on the Target app and requested a replacement be sent to me and it was automatically approved after I submitted it. It only took two days for them to arrive. They are very similar to gliding core discs I have from SPRI and work just the same. I like these discs better because the branding is smaller and cleaner (not that it matters a lot but I appreciate it). These discs are very helpful for doing ab exercises during this quarantine. I use the carpet side on a rug and it glides just fine. I know this is out of stock currently but definitely consider ordering them when they are restocked if you are working out at home.