Independently tested and validated to EU guidelines by the UK National Health Service. Will keep blood at critical temperature for 12+ hours. No need for coolants. Self inflating internal cushion. Fully collapsible for easy storage. Stackable. All materials are waterproof, have rot proof stitching, are anti-fungal and come with a two year guarantee, subject to normal wear and tear. SKU: PWB Categories: Bags, NHS, Pharma, Vaccine Transport