Many people think that thigh high socks don't need to be reliable because many people just come prepared for a party or holiday parade, and pairing thigh high socks with a nice cosplay costume or tall boots is a great option. So they think these socks are disposable and more important to be cute than whether they are reliable enough. There are also many people who are fans of thigh-high socks, for whom these socks are not disposable and they are willing to take these socks as an everyday pairing with short skirts, boots or even leather shoes that make them look very cute. Compared to leggings, thigh high socks are much cuter because they look more vibrant with skirts.
One detail we can notice is that fans of thigh-high socks pay more attention to the reliability of the socks, of course this is because they use thigh-high socks more often as a daily wear, but that's not all. The more important reason is that if you don't care about the reliability of the thigh high socks, then you may get less socks than will be your expectation. For example, if you expect your thigh high socks to support a party all night, but in fact they will probably fall short of your expectations, it's hard to say why, but it's usually the norm to get less than expected.
It's not an exaggeration to say that some low quality thigh high socks may tear at the fitting stage because these socks are so thin. When you reach inside these socks with your hand, you can easily see the color of your skin through these socks even without any expansion. When you actually try them on, these socks become almost transparent in color, and they are actually not black or any other color you want, but a mixture of the sock color and your skin color. They are nearly transparent and look completely different from what they look like in the package. It is not feasible to secure these socks with a garter, as the buckle of the garter will easily tear them.
The reliability of thigh high socks is of course determined by many things, such as material, thickness, fading, etc. But most intuitively, the clearer the sock, the more fragile it is, and the thicker the thigh high sock, the more reliable it is. This is simple common sense physics, and is the most intuitive criterion used to determine the reliability of socks for the average consumer, especially for people buying thigh high socks for the first time.
The conclusion is that even if you are buying some thigh high socks just to prepare for a party or parade in a few days, even if you are only going to wear them once, I highly recommend that you choose better quality socks because you must leave some margin for your plans and minimize uncontrollable factors. Also if you have a pair of high quality thigh high socks, you will most likely really love this option because they are really cute.