As a starting point let's consider the Solid Colors Women's spaghetti strap dress, also known as the Celmia Women Round Neck Sleeveless Solid Color Spaghetti Strap Long Dress.
This dress is designed to be a lightweight undergarment, perfect for wearing under other dresses or as a slip. It is made from a thin, see-through cotton material and is available in a range of sizes.

In practice this dress lives up to its intended purpose as a comfortable and practical undergarment. The thin cotton material is delicate and light, making it ideal for wearing in warmer weather. The dress is well-constructed and of high quality, with neat and conscientious stitching. The sizing is accurate and true-to-measure, and the dress is easy to wear.

The advantages of the Solid Colors Women's spaghetti strap dress are clear. It is a great option for those looking for a lightweight undergarment to wear under other dresses or as a slip. It is also available in a range of sizes, ensuring a good fit for all body types. The only weakness of this dress is that it may be too see-through to wear on its own as a dress, but this is not its intended purpose.

In conclusion if you're in the market for a comfortable and practical undergarment to wear under other dresses, the Solid Colors Women's spaghetti strap dress is an excellent choice. It is well-constructed, true-to-size, and made from a delicate and lightweight cotton material. Although it may be too sheer to wear as a dress on its own it is a perfect option for layering or as a slip. Overall, this dress is a great addition to any wardrobe.