SC Johnson - A family company. Grip 'n seal technology. Microwave safe. Strong enough to use again. SC Johnson - A family company since 1886 - Fisk Johnson. Fill, use, repeat. Defrost & reheat - vent bag1 inch. See bottom for details. Compared to other freezer seal top bags. Environmental Facts: Bags are recyclable when clean and dry at drop-off bins at participating retailers. Bags made with wind power.