This is my 3rd Koala clip and each one has proven to be my must-have running accessory. My phone is still with me but out of the way. It doesn’t budge, chafe, or bother me at all. I’ve ran in intense heat, intense cold, pouring down rain, snow, you name it- my phone has been safe and dry EVERY time. I’ve used it with different bras and even in the front of my bra before and it worked great. Love this product and love that they be come with mantras!