Summer riding tops that aren't clingy

I think I'm going to have a look at the Ariat sleeveless polos at Badminton on Sunday! Not adverse to a polo!
 
What do you all wear for riding in the summer? I'm always so concious of my "mum tum" so I don't want anything clingy - I'd love to be able to wear baselayers all day long but only feel comfy If i have a gilet or something over the top with them! So looking for something a bit more forgiving/baggy/flattering!
I wear running vests or tops (Rab, or my running club vest). I think I have an Ariat sunstopper (sleeveless, lightweight, meshy like material), but it's just too nice to ride in, so I wear it for work!!
 
Useful post. My problem is I want sleeveless and if I size up they are too long and low and I'm a bit old for the 'showing a bit of bra' look. Childrens have mostly got pictures or something. My last buy was about 4 years ago and I had to shorten them all at the shoulder to lift them. I'm 5'2 and would normally buy an 8 but buy 10 to make sure they are loose and cool. Also want cheap! Just ordered some from Amazon, will report back....... I like the look of the short sleeve ones suggested by @Penguin_Toes when I need more short sleeves
I have some cheapo shirts from Amazon which are comfortable and don't come up long
 
Useful post. My problem is I want sleeveless and if I size up they are too long and low and I'm a bit old for the 'showing a bit of bra' look. Childrens have mostly got pictures or something. My last buy was about 4 years ago and I had to shorten them all at the shoulder to lift them. I'm 5'2 and would normally buy an 8 but buy 10 to make sure they are loose and cool. Also want cheap! Just ordered some from Amazon, will report back....... I like the look of the short sleeve ones suggested by @Penguin_Toes when I need more short sleeves

The answer to tops cut too low at the neck is to buy mens. Primark now do extra small in mens that are obviously being bought by women like me who don't want to show off our aged chests 😁 They also shrink plenty if they are too big to start!
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I wear t-shirts from Primark, not the tight-fitting stretchy ones but the looser, cotton ones, they’re £3 I think. I always have a look at the sale items in Sainsbury’s too - sometimes you can find basic loose t-shirts at rock bottom prices (paid £1.80 yesterday!)
 
Mountain Horse Isocool tops currently in their sale - 9.99. They have long sleeves which I like as I burn easily, are not clingy if you go up a size and wash really well.
 
I really like these. I've got them in a load of different colours. They are a lovely shape.and base layer type material.
How do they fit size wise? I'm usually a 12 but like things baggy but seen the 12 and 14 are out of stock as on offer :(
 
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