For outdoor arenas – Each OT40 Equibase outdoor mat comes equipped with alternating drainage vents and water reservoirs, for more consistent moisture throughout the footing.
The drainage holes allow excess water to pass through the footing, out through the mat, and out of your base, whilst retaining up to a gallon of water per mat.
For indoor arenas – each mat is capable of holding 2 gallons of water which is wicked up into the surface as needed.