The added resin helps penetration and flexibility of your bowstring. Keep your bow string wax clean and dry. The wax blocks also have an embossed arrowhead detail.
There are also 2 more styles available:
1. Small wax in box
2. Large String box with wax - wrap your spare bowstring around the foam inlay and keep it clean and dry in the box.
Replacement wax also available for these boxes.