Large size allows 2-3 kids to play together-Kids-friendly HDPE material is safe, durable and odorless-Firm connection and sturdy construction ensure long-term use-Waterproof and durable oxford cover protects sands from blowing away-Ground liner comes perforated for drainage-4 corner seats for resting and comfortable playing-Perfect gift for children over 3 years old-ASTM and CPSIA certification let you rest assured-Easy to assemble with a few steps and short time Installation guide