Sleep cover case for Libra.... I'm not sure

Hey Libra owners, do you use a sleep cover / filp case? I used to have my libra colour without a case while reading and had a sleeve for transport. Yesterday I got the original basic sleep cover from kobo bc I wanted better protection for my device. Although I love the colour of the case (mint green✨) I'm not sure if I should keep it. It adds more weight then I was expecting.

If you use a sleep cover, did you get used to the weight or do you still think its heavy?