DEFINITELY a buy. We love Friendsheep Eco Dryer Balls. The 100% wool dryer balls are eco-friendly and reusable. While costing more upfront, you make it up in 3 months compared to Downy dryer sheets. We expect them to last for years, reducing carbon footprint significantly over time, and not contributing to landfills. These fun dryer balls are a perfect gift for someone trying to be more green.