This shirt is the lightest weight, most breathable workout shirt I own. I live in Florida, so it matters. Most of Nike's other "dry" clothing feels thick and heavy like my grandmother's polyester pants - EWW!! But not this shirt. This top feels somewhat more cotton-y and really allows air to pass through. It is slightly see-through, so I still take a hoodie to wear it after my workout to the grocery store etc. But it doesn't turn heads either....it's not so obviously see-through that you feel awkward wearing it to the gym or running. I have one in every color they make....I hope. If not, I'll find the missing color and buy that one too!