Hefty Shrink-Pak Clear Vacuum Cube Storage Bags 4-XL is compressed space-saving storage and organization that shield clothes, blankets, and pillows from moisture, odors, dust, and insects. Its air-tight, high-speed valve fits most vacuum attachments. Clear, see-through storage bag with a red and yellow Double Closure zipper that slides together for a Double Closure, air-tight seal. Shrink-Pak bag is confidently devoted to shrinking and packing your things.