Sewport describes NeoShell as an electrospun polyurethane membrane designed for water resistance, air movement and flexibility. The fine-fibre structure provides a route different from the expanded-PTFE systems often discussed in protective clothing. Its role is functional rather than identifying the visible face fabric.

NeoShell Balances a Protective Membrane With Air Movement

The completed garment still combines layers, seams and design choices. Comparing those details is necessary when evaluating breathability or protection, because a membrane's intended properties do not automatically specify every aspect of the finished outdoor product.