Heavy (almost) Strapless Dress

If the dress is slipping down, I'd wonder if it's tight enough? Even in a strapless dress, the structure & tightness of the bodice is what keeps the dress up where it belongs. If it's purely the weight and the dress is already as tight as it can reasonably be, then like others suggested I'd talk with your seamstress about the possibility of removing any of the weight from the skirt and/or adding more substantial straps. It sounds like daughter's dress was fairly similar to yours -- big, full, multi-layer skirt, a pretty much backless bodice, and very thin jeweled straps that were really just decoration. For her the issue was that the bodice wasn't tight enough. The seamstress also added a thin, nude-color underlining to the straps because they were both digging in to her shoulders & the beading was so irritating her shoulders would turn bright red after wearing her dress just for a few minutes. Both adjustments worked to correct all the issues. Good luck!

I think the challenge here is the low back. If you have a small waist, ample bust, and hips that are larger than your waist, and the dress is correctly fitted to your waist then it shouldn't slip because the dress should "stop" at the point where your hips get wider than your waist. If you happen to be very triangle shaped, and have hips that are smaller than your waist, then the dress might continue to slip. With a low back, there isn't a way to cinch up the waist in the same way there would be if there is more fabric.

Is it possible the straps are just too short? For a dress with "non functional" straps like you describe the dress really shouldn't require the straps to stay on at all and should just sit in place how it is supposed to.

I think you'll likely either need to add substance to the straps, add material around the back (to make the torso area more structured), or remove weight from the dress somehow.

I’m a plus gal and didn’t want strapless for same reason-I didn’t want to be yanking it up all day. My seamstress is moving straps more to center, and making a little longer. But the bodice is snug as well. Have the seamstress work on it a bit.