Inflatable evacuation mattress

An inflatable body having a direction of elongation and including an elongate chamber delimited by two substantially planar main walls, approximately parallel and gastight, said chamber defining at least a portion of a base suitable for holding a person laid down in said direction of elongation, the chamber being extended, integrally, on both sides of the base, beyond a transition area where said main walls are close to each other, by two raised lateral strips extending along at least said portion of said base, so as to laterally flank the person, wherein:

• said main walls are braced by a plurality of drop stitch links, and,
• at the location of the transition area, the inflatable body has at least one seam that brings the main walls together, thereby causing a fold between the base and each of the raised lateral strips, with each said seam being covered by a sealed lining wall.