The Leki Trigger S system replaces traditional nylon straps with a click-in mechanism that attaches your pole directly to compatible Leki gloves or strap adapters. The big advantage is safety: if you take a hard fall, the pole releases under excessive force, which can help prevent thumb and wrist injuries—a surprisingly common ski injury from standard straps getting yanked the wrong way.
It's also convenient. You can click in and out of your poles instantly at the lift line without fumbling with straps, and the connection feels secure during normal skiing.
The catch is that Trigger S requires Leki-compatible gloves or small strap adapters that click into the system, so you're buying into their ecosystem. It also comes at a premium price. If you've had thumb or wrist injuries from pole straps, or you just want the convenience and safety benefit, it's a worthwhile upgrade. Most casual skiers do just fine with standard straps.