They stay on a little better if you put them between an undershirt and an ...
They work perfectly, but only if you use them on cotton shirts. If you try to stick them to knits, they will fall off. If you stick them to synthetic materials they will leave some adhesive behind (which you can remove with an eraser if that happens). They stay on a little better if you put them between an undershirt and an outer shirt rather than right up against your skin, and they tend to fall off if you frequently are raising your arms above your head.
Rating: 5 stars