This drop-in bathtub is featured by: self-draining system, sloped bottom to avoid water stagnation, a fiberglas layer to protect the shell, a supporting metallic bottom frame and optional headrest and sanitising system, adjustable by means of the electonic built-in control panel. Besides the traditional whirlpool ( in Hydro Friendly, Base and Top version) Aquasoul series is featured by four pre-set cycles (silence, breath, renew, dream). Advertised in the picture is Aquasoul Double, in Hydro Top version with soundproof insulation.