The Harp is our most reliable approach disc. Designed to withstand and type of conditions. It will hold in the wind. In our BT Soft plastic the Harp is very flexible and feels great in your hand. Use the soft in cold weather and it will still have that soft feel. Use the BT stiff in the summer and it will still hold its shape. For professional players this could be there only approach disc they will need to carry as it can hold anyones arm speed and still hyzer. For slower arms it will be your most over stable approach disc. Westside Harp is a PDGA approved disc.