Shroud comprising a bag or transparent body (1) and which is characterized in that it incorporates at least two valves (2), one in its central part and one at its end, to practice the extraction of the oxygen housed inside it ; and in that the body (1) has an opening (1a) with a hermetic seal (7) on one of its sides. (Machine-translation by Google Translate, not legally binding)1. Sudario que comprende una bolsa o cuerpo transparente (1) y que está caracterizado porque incorpora al menos dos válvulas (2), una en su parte central y otra en uno de sus extremos, para practicar la extracción del oxígeno albergado en su interior; y porque, el cuerpo (1) presenta en uno de sus laterales una apertura (1a) con cierre hermético (7).