From the product description, check product page for current description, price and availability:

• Travel Essentials: the combo includes 12 bags (6 M size & 6 L size), saving up to 80% space no vacuum needed, providing a perfect storage solution for travel and home.
• Compression bags: the dual zippers has one lower side and one higher side, easy to close and re-open, separating the zipper when opening the bag is not a challenge any more!
• Travel Accessories: the unique Double-Zip design has separated yellow and blue lines on each sides. Better visualize full sealing of the zipper closure.
• Vacuum Packing Bags: the bags are manufactured under the strictest quality control standards using premium material, ensure long-term storage in the compression bags.