Great shirt and looks stylish while being comfortable. I bought it in black and white- both beautiful. The fabric feels good on you, smooth, light weight, comfortable, does not wrinkle easily, and the design is attractive- showing a more slim line. I am chesty and it fit nice: it was NOT oversized to accommodate the chest while sacrificing a slimmer waste. I have not found it makes you feel hot at all. It has not been "see through", even in white. I also note the sleeve holes are not so large as to expose my bra, which is often an issue with tank type tops. This pairs well with both skirts and jeans, as well as "shorts". I like I can zip it up for more conservative looks at church, but can make it more flirty with my husband at home.The inner lining shows on the collar when unzipped fully on white shirts, but it is not as much noticeable (or noticeable at all) with the black shirt. Still, if others notice, the lining it does not look bad. The sun block quality is probably not as key as it is sleeveless, unless you were planning on pairing it with a jacket or covering.If you will be going in and out of air conditioning to an opposite temp outside (warmer or cooler) this works well when paired with the jacket or similar covering. I used an SPF sweater style covering in these cases.This is a good and attractive value, and one of my favorites to wear as it really does cut an attractive look, even when I have a more chubby day.