Even though UNIBAG filters by Eaton offer the same cost-efficient price as a similar bag with a sewn design, these polyester bags offer a fully welded design, meaning no particles escape from sewn holes. The material is at least 40 percent recycled fibers. The polypropylene seal ring gives a chemical resistant closure, and the ringà ¯Ã‚ ¾Ã¢â‚¬â„¢s handle means replacement is simple and easy. These 100 percent bypass-free filter bags are tested to meet Eaton's strict standards of acceptability, have a micron rating of 1, and are a size 2. Sold in quantities of 30.