For High jump pits of another range.
Specify length, width and height.
5 sides.
1000 deniers PVC cover,
Top is blue and sides are grey.
To avoid cover to be blown off, they are fitted with eyelets and sandow to hang underneath and all around duckboards.

ADVICE :use a badweather cover even when you have metallic mattress cover for landing areas.
By the m²