Magda,
Yes, they are weighted gloves in that are used in STS. I think Liann is referring to Cathe's kickboxing workouts, where they wrapped their hands (correct me if I'm wrong, Liann?).
I don't whether the 2lb weighted gloves have a closed palm, because they haven't been released for sale yet. Only Cathe or SNM can answer that, I suppose. The 1lb weighted gloves that are now sold out on ShopCathe.com have an open palm. Personally I like to do as you say and wear my fitness gloves underneath the 1lb FBC weighted gloves. It keeps the weighted gloves from slipping around, and gives me protection on my palms.
HTH,
Sandra