Will Ski-Lash ski carrier fit on wide powder skis?

Yes. The Ski-Lash straps are each 18 inches (41 cm) long and wrap around the skis inside of the binding area. As such, they should easily fit around even the widest skis.

The Straps on a Ski-Lash Jr. are 12 1/2 inches long and are designed for carrying skis of 120 cm in length or less.