You can use them in two different ways: Put the flat side down to get the hang of it, and then flip it to pebble-side-down for an exercise in instability. The textured side is also used for rehabilitation and massage therapy of your plantar fascia. Ease your weight onto your foot and begin slowly rocking back and forth then side to side on either one or two feet. This will help to break up your plantar fasciitis -- but start slow and work your way into it; don't be too aggressive at first.
Dimensions: 6" x 4" x 6" (L x W x H)
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