Customers say these thongs are incredibly soft and comfortable, staying in place throughout the day without creating visible lines. The stretchy fabric fits well across different sizes, with many noting they feel almost undetectable when worn. Users appreciate the quality material and versatile fit, with several mentioning they've purchased multiple pairs. A few reviewers were initially skeptical about the one-size-fits-all design but found it delivered on comfort and support. Common feedback highlights the smooth, breathable feel and how well these pair with various outfits.