Created by a cellist using fine Greek pine tree resin, high quality Melos Rosin is available in several formulations Suggested use, below, but certainly select based on your playing style & preference, as dark can be used during the summer, etc:
Light-: perfect for warm climates, smooth playing for solo & chamber music
Dark: great for lower temperatures, for full sound orchestral and solo playing
Sticky-: softer rosin for stronger grip