The paper was very thin. I used them for a mailing and was afraid they would get damaged bent or rip easily. The next time I will look for a heavier paper weight.
The cards are lighter weight than what I bought a few years ago and really didn't need 500 of them. I was hoping to get a pack of 50 but none were available unlined. I wanted them to use as recipe cards for my grandson who starts college soon and will be doing his own cooking. I covered them in contact paper to protect the cards from getting dirty so the extra layers helped stabilize the cards a bit more.
I used the unlined cards to print a handout for a political event. I printed both sides in an inkjet printer and the cards worked great. I was concerned that they might jam in the feed process but they feed without a problem.