The recent more-than-human turn in design calls for "designing-with" other species and ecologies beyond humans. Yet-as Thomas Nagel's famous "What is it like to be a bat?" thought experiment highlights-human experience is constrained by our own sensorium and an irreducible gap in phenomenal access to nonhuman lifeworlds. This paper proposes More-than-Human through Human Augmentation (MtHtHA, denoted ">HtH+") as a design approach that repurposes human augmentation technologies-typically aimed at enhancing human capabilities-away from human optimization and exceptionalism but toward eco-phenomenological awareness. Grounded in somaesthetic design and eco-somatics, MtHtHA entails creating temporary, embodied experiences that modulate the human Umwelt to re-sensitize us to pluriversal more-than-human perceptions. We articulate seven design principles and report five design cases-EchoVision (bat-like echolocation), FeltSight (star-nosed-mole tactile navigation), FungiSync (fungal network attunement), TentacUs (octopus-like distributed agency), and City of Sparkles (urban data from AI's perspective). We demonstrate that such experiential "designing-with" can cultivate ecological awareness, empathy and obligations of care across species boundaries.

Submitted to DRS 2026