I bought them from Kimco Distributing Corp. Genuine Weller Sponges are made in the USA ("packaged in Mexico") and instantly moisturize to full, luxurious thickness in a second or two in warm water. They look just like the Weller sponges they made 20 years ago. These sponges are durable and a far cry from the flimsy paper imitations you can see for a few dollars less. They are ideal for WES soldering stations.