RuthArt wrote:I have a Swift FX that I have been trying to wear....I'm thinking it must be for males because I have to cinch the top strap so tight that the
back strap is almost to my crown and it will not stay on the back of my head; ...I have a very small head.
I have a very small head. (My ski helmet is an XS and that's actually a bit too big for me.) But I have no trouble keeping the Swift FX in place. And even though I wear it riduculously loose, I have no problems with leaks.
I have the TOP silicone strap loose enough to get several fingers between the top strap and my head without stretching the top strap at all. In other words, the top strap doesn't even touch my head. The bottom strap just over my ears and around the back. I have that strap comfortably "tight" or comfortably "loose." This strap does touch my head, but I can easily slip a finger or two under the strap without significant pulling on the strap. I have also found that I tend to prefer to keep one side of the back strap tigher than the other side. (I'm a side sleeper and I think that has something to do with it.)
Another thing that may be relevant in why my FX fits my small head so well: I use a custom mask pad made by Padacheek for the
entire silicone strap. (She's actually made me two of them.) I do have to safety pin the top strap to the Padacheek pad to keep it from slipping off the pad and getting tangled in my hair.
I hope there is more that can be done to help get a good fit. (I'm still having trouble finding the right size for the nostrils, I've tried
everyone except large, I have small nostrils, but get leaks on all sizes, probably because I can't get it to fit properly
If you've got the top strap pulled so tight that the back strap is near the crown of your head, the pillows are at the wrong angle to seal properly. That would easily explain the leaks you've experienced.
My advice is to loosen the top strap
a lot and see if that helps you anchor the backstrap around your head with the pillows at the right angle.