Rattlesnakes like hiding out in rock crevices. Good thing there are none in this fun

ClimberGlass Fiber Reinforced Concrete (GFRC): A concrete mix reinforced throughout with chopped glass fibers. Cement used shall be Type 1 Portland cement meeting the requirement of the ASTM C 150. Fine, clean, dry sand, able to pass a No. 20 sieve, free of contaminants or deleterious matter and meeting composition requirements of ASTM C144. Glass Fibers specially designed for use in concrete; shall be alkali-resistant (AR) fiber and chopped to 18mm lengths, with 12mm lengths in any topical coat. Concrete shall have integral color that shall be harmless to concrete strength, alkali-resistant, shall not to exceed 10% of amount of cement, and conforming to the requirements of ASTM C979 for color steadfastness. Minimum physical properties shall be: 1500 pounds per square inch in tension and 5000 pounds per square inch in compression.

Dimensions – 7′-11″ long (2.4m), 4′-2″ wide (1.3m) 4′-2″ tall (1.3m)