Bluebird Day Gear Telemark LeashesBluebird Day Gear's telemark leashes are the toughest on the market. They use the highest quality materials that they can find to ensure that your skis will stay attached. If you manage to break them, they will replace them, guaranteed. Their ergonomic design allows you to use the leashes without removing your gloves or mittens.To determine which length leash one is right for you, snap your boot into your binding and find a ruler. Measure the distance between the girth hitch hole in your binding and the D ring on your boot. Regular: Less than 7"XL: 7" to 8.5"