There is a small felt edge around the whole heart which can easily be used to stitch the heart down – which I HIGHLY recommend if you want to put it on something you wash or something like a backpack with a waterproof coating (bc even gorilla super glue won't stick to some backpacks!).The sequins are sewn onto a felt backing and are very secure. You can iron the patch onto whatever it is you're going to put it on, to keep it in place while you then sew the patch down. Or use a little fabric glue to keep it place while you sew it down (which I did). The felt edges stick out a little bit and I used embroidery floss in a more peach-toned pink (to match to a peachy-pink tutu for my nieces) to wrap around the whole edge and it came out looking really nice (except for my fabric puckering!). I also did a chainsitch around the whole thing to use more of the peachy-pink color, so that isn't part of the patch.The girls loved the sequined hearts, even though they are a blue-toned pink and didn't quite match the tutus (I guess toddlers aren't as exacting as I am when it comes to color lol) and no one but me cared about my puckered stitching! All-in-all, it was a pain for me to sew them down but the quality is better than I expected and they've withstood many washes so far without ANY missing sequins!