Aluminum Crystal Card Size:One Size High density ball provides aggressive

High density ball provides aggressive deep tissue massage to IT Band

But they'll look at you like a clown

3D Fit contours to ankle area to provide compression and support

two-vestibule design makes it easy to move in and stretch out

Good sliding properties

Aluminum Crystal Card Size:One Size High density ball provides aggressiveThe aluminum crystal card provides a surface to analyze classify snow grains and also has a slope index, which allows you to determine slope angles from a topographical map. Snow crystals placed on the card become recognizable and sizable. With the aluminum card version, you can expect durability and long term usage. This small yet very informational tool will take your snow safety skills to a new level.