BCA Alpine Trekkers: BCA’s Alpine Trekkers ensure easy access to your backcountry hideouts. They are the must-have for those looking to break into the touring scene and for hard-changing skiers wanting the performance and reliability of their full alpine binding on burly descents. Just click your Trekkers into your bindings. Then snap in your boots (or vice versa). Your heels are now free. When you reach the top, remove your BCA Alpine Trekkers and step back into your bindings.