Fits inside Crua Duo (also available for sale). Includes double action pump. The Crua Culla is a modular, insulated inner tent designed to provide thermal regulation and acoustic dampening. It features a patented insulation material specifically engineered to maintain internal temperatures by reflecting heat back into the enclosure during cold conditions while remaining breathable in warmer weather. The structure is designed to fit inside compatible Crua tents or as a standalone unit, utilizing an air-frame beam system for rapid deployment. The design includes integrated ventilation ports to manage airflow and a durable, light-blocking fabric to reduce external light infiltration.