A lightweight jacket stays closed along its front with a row of small plastic snap fasteners. Each snap connects two fabric panels securely, keeping the edges aligned and the opening fully covered.
The panels hold together steadily even as hands tug them apart gently at first. The snaps maintain their firm grip, with the halves staying interlocked.
This balance persists until the pull on one snap equals its holding strength. At that exact instant, the snap pops open.
Before the pop, the fastener shows no gap, halves fully engaged. Right after, the halves disengage with a sharp click, panels separate visibly, and a gap forms instantly.
The jacket's front now features an open section where the snap has released its hold.