Do tell. Brand name? Store name? Mfr. name? Size? Price per bag?
I imagine the ones you bought are a couple mils thick vs. the more expensive 4-5 mil...which should be ok.
Inquiring minds want to know.
I just bought the ones at foods for less grocery store chain that were in the plastic wrap etc. They were their brand what ever it is, they are labeled long term heat vac and store bags. there are the generic version of the ones that they had on tv they were selling. I just dumped this out of the boxes into a kitchen drawl or I would tell you exactly.
They are simular to these ones at this link:
http://www.uline.com/BL_5552/Food-Bags