I advise you not to use it. They're hard to open, they don't slide easily at all, and the thumb latch that you slide to open is too small. I tried them while riding in warm water and it was so hard I actually cut my finger trying to open the thing. In cold water and/or gloves this would be impossible. They seem strong enough, I don't think they can open. I'll try to delegate them to dry one-off jobs.