Friend's cap strap keep slipping off the toes and to the top of the foot. Visually the angle of the strap looks good and seems to mold around the toes. Unfortunately no matter how tight we make it the strap just won't stay in place. After a run or two the cap will slip over the toe. We ended up just strapping it to the top of the foot instead of the tip.
Is it because the binding is of the wrong size? or just one of those bad boot/binding combinations?
Unfortunately I am already omw back to LA so I have no idea the model of her binding and boots.
Another trick is to push you toe flat as if you were starting to engage you toe edge after you've already tightened them, then tighten it again. Should get an extra click out of this. This is assuming you strap in while standing up.
I think what can happen sometimes is that you think you've got it tight, but when you start riding and flexing the board toeside it can sometimes create enough slack for them to slip. What I've mentioned can help with that.