Kikkerland Puffer Fish Laundry Reusable Dryer Buddies (Set of 2) - Walmart.com
Puffer Fish Dryer Buddies
Sloth Squad - Eco Dryer Balls
Cat Dryer Buddies – Tarzianwestforhousewares
On the Left: Brand new Hedgehog Dryer Buddy On the Right: Hedgehog Dryer Buddy after approx 12 years of use (they are thrown in the dryer with clothes to help fluff them) :