Dry ski slope
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Dry ski slopes are an attempt to mimic the attributes of snow using materials that are usable at normal summer temperatures.
The usual material is dendix which is similar to a short haired brush with the bristles sticking upwards. This is arranged in a hexagonal pattern of approximately 1 inch (25 mm) strips of bristles in a 4 inch (100 mm) hexagon. It doesn't really feel that much like snow but it is good enough to ride a snowboard or ski on with some practice. Water is often sprayed onto the surface of the dendix to lubricate it and increase the skiing speed.
More recently a new material, SnowFlex, has been introduced. The new material looks like white AstroTurf. This is better than dendix but still not as good as snow.