The crossfit AbMat is used to fill the space between the floor and the lumbar arch,
it supports the spine and allows activation of the lower abdominals during situps.
Without the AbMat your training will add extra stress on the spine and result in an incomplete movement.
With this in mind it is best to use the AbMat for every floor based Ab exercise.
Black PVC with High Density EVA Foam.
40cm (L) x 30cm (w) x 9cm (h) Arch