No! The seam above the cup is too thick to be a t shirt bra! It has itchy stiching on the back of the strap, theres also way too much elastic in the straps, both the arm straps and the band, and its not that light of a padding. The cups are molded and don't collapse at all. Also, I followed the measurements and ordered a 36C. I measured myself 4 times because I am always a 34DD, or a 34D! But the cups were a bit too small. I would go with a 36 DD if it had any support. The elastic in the band means your boobs will bounce out of the molded cups and show boob bulges under your t shirt! Gross!
  Now my boobs are bigger than average, I have a 34inch band so my bone structure isn't that large and I have been like this since adolescent. I must have very high expectations for bras. Why wear one if walking makes you jiggle?