It is supportive, which I suppose is the whole point of a strapless bra, but I"m only a B, so it's not like my girls are going anywhere to begin with.  There is just the right amount of rubber to keep it from sliding around...however, the lace trim is SUPER ITCHY which is why I could never recommend this product to anyone.  It feels like it's a overall made of a cheaper material, and the lace is right there with the quailty.  If you're in a jam, I suppose this would do; but I recommend spending a few more bucks for something with better quailty and less itch.  If I had seen this in the store, I would never have purchased it.