Lilijuan063 Hello! Seamless briefs are invisible to wear, and it is better to wear tight pants and tight skirts. Will not show ugly underwear traces. But then again, whatever underwear you wear needs to fit, even seamless briefs, which are too small to be fat. Therefore, I still suggest you buy underwear and choose cotton or other fabrics with good quality and elasticity, so that there will be no scars, and secondly, it will not tire your thighs and cause poor blood circulation. And wearing underwear that doesn't fit for a long time will produce lacing lines for a long time, which is very bad. You can go to a specialty store, or go to a regular online mall to buy it, which is more secure, refundable and safer.