Ultralette

Ultralette is a term used in speculative design and some niche scientific discussions to describe an ultra-light, sheet-like material. There is no universally accepted definition, and the term is not standardized in mainstream materials science.

In design contexts, ultralette may refer to a two-dimensional metamaterial or composite film composed of a lattice of micro-scale cells arranged to minimize mass while preserving stiffness. In textiles, it is sometimes used to describe ultra-light fabrics or membranes intended for outdoor or aerospace-inspired applications, often implying translucency or breathability.

Reported properties are speculative and depend on the intended realization; conceptual accounts emphasize high specific strength, low density, and tunable mechanical or optical characteristics. Some discussions explore tunable porosity, thermal management, or transparency in ultralette films.

Development status is varied; there are no widely adopted specifications or production methods, and most discussions exist in design fiction, academic papers, or prototype demonstrations.

Related topics include ultralight materials, metamaterials, and lightweight composites.