Polystyrene IT'S THE INSIDE THAT MATTERS: Give your bean chair or pool float some love with Big Joe rejuvenating polystyrene beans. They are lightweight and 100% recyclable! EASY TO REFILL: Cut along the provided dotted line of the refill bag and simply pour. BRING YOUR BIG JOE BACK TO LIFE: For an approximate amount to refill, a small chair or pool float may need 2-3 bags, while larger ones may need 3-4. SIZING: Available in a two-pack. HOME GROWN: Popped right here in the USA.