Check the listing for details. Auralex U-Boat Floor Floaters (300-pack). Condition: New. Listed at 899.99 USD. Advanced Geometry for Rock‑solid Lateral Support Crafted from a specially formulated silicone compound, Auralex U-Boats leverage proprietary U-shaped channels to support framing members while isolating and decoupling them from the surrounding structure. These innovative floor floaters boast precision-notched grooves, reducing surface area contact and offering an optimal compressive ratio, significantly reducing vibrational transfer. Moreover, its patent-pending bulge geometry facilitates lateral support while ensuring minimal joist contact. At Sweetwater, we're especially impressed with how easy U-Boats are to install; their tall side walls slip easily over floor joists, and for dimensional lumber variations, they can be stapled or nailed to one side for a secure fit.