Fabric question

I'm trying to find a brand of white 100 percent cotton t-shirts suitable for dying. My default is some variety of Hanes heavyweight or "beefy" t-shirt. What I don't like is the t-shirt material that feels stretchy and thin. I'm also confused as to what terms like ring-spun mean, along with the 5 or 6 number which seems to refer to weight.

Any recommendations/explanations would be welcome, thanks!

Creating your summer reading list

This Lifehacker post
http://lifehacker.com/5807774/how-to-create-an-awesome-summer-reading-list
has a number of really good tips for collecting reading recommendations in general, and includes reminders to be realistic about how much time you have and weeding out your to be read pile. I just went through he Readercon guest list earlier today, and that gave me some nice additions to my summer reading list. I also still have many books about or set in New Orleans, and I am also hoping to find some good art books.