Very slim design and soft feel. The adhesive is pretty strong especially since the back of my phone case is textured with close, deep ridges running horizontally. So pro tip for people who may have problems with adhesion and if you don’t mind causing a little same to your smooth phone cases, take a nail file or some sandpaper (fine grit should be good ie. 400-600 grit) and gently rough the small area where the wallet is going to be placed. Wipe off any dust or residue with alcohol and let it dry completely and for extra adhesion take a hair dryer or heater to the adhesive on the wallet right before sticking it to your phone, apply slight pressure, and you’re done. I absolutely love this wallet!