A relatively recent development in rock climbing, slab climbing refers to any ascent of rock faces that are at less than 90 degrees. Although less physically intense than some styles, slab climbing is extremely technically demanding. Very different for other forms of climbing, slab requires specific techniques including smearing and special body positioning. The placement of the climbersê feet is the key factor in successful slab climbing with hands and arms being used mainly for balance rather than to move up the slab. Slab climbing usually requires pre-determined routes to ensure proper protection from falls..