EcoRosin is a new line of premium rosins?from Leatherwood Bespoke Rosin of Australia. EcoRosin strives to leave zero footprint on our planet while offering players premium rosins for colorful playing. EcoRosin uses natural plant-based ingredients and resins, including organic wwaxes and hemp. It uses no animal products and is 100% Vegan. It is biodegradable, leaves no waste, and estimated CO2 emissions are offset through investments in renewable energy products. And it sounds pretty good too. Offering a clean and precise bite on the string, with a generous warmth in sonorous playing. The strength of the bite on the string is varied in each recipe to suite Violin, Viola, or Cello.