not for me and my iPhone 7+

The first bullet line of the description is: DESIGNED FOR IPHONE 7/8 Plus - Compatible with iPhone 8 Pluse/iPhone 7 pluse/iPhone 6/6S Plus,big enough even if your device has been put into other protector case.  I can tell you it does not provide for that.  I had to take it out of my case and it slid into the sleeve and the flap covered it completely.  Even if I'd had a rubber bumper case, it would not have fit my 7 plus.  This was a disappointment because I did not want to remove my phone from the protective case to put it into this arm band to sweat in.  I bought it specifically because they said it would be big enough even if my device was in another protective case.  I gave it to my daughter who has an iPhone 7 (regular size) and her phone fits with her case snugly.  I wished it would've worked out for me to use it but not for iPhone 7 plus unless it's out of it's case.  But the sweat factor is real!