Resealable polythene bags.
Grip seal bags are multi-purpose clear polythene bags with a plastic fastening that clicks shut and pulls open. These easy-seal bags are very versatile and can be re-used again and again.
Resealable polythene bags are also known as supagrip, minigrip, grippa, ziplock, zipper, easy-seal and self-seal bags.
Gauge: 200g, Micron: 50m.
See also: Grip Seal Bags with Write-on Panel.