Ground protection: Pool mat – protects pool base from stones and roots Details: Round black puzzle mat, 17 pieces – Diameter approx. 200 cm – Thickness approx. 1.2 cm Insulation: Underlay reduces heat loss to ground – pool water stays warmer longer Comfort: Padded base for a comfier bath – Includes filter underlay to reduce noise Safety: Textured pool mat – non-slip for secure footing