Walking on the moon? No, but the 847v2 will take your walk to a whole new level thanks to the total inner comfort of OrthoLite foam throughout the collar. And the rest of your foot will glide weightlessly on the stability of the ROLLBAR midsole and ABZORB cushioning. This shoe runs small. We suggest ordering a 1/2 size up. The 847v2. Step up to a new level of walking comfort.• 12 mm drop: due to variances created during the development and manufacturing processes, all references to 12 mm drop are approximate • LIGHTNING DRY® liner keeps your feet dry and comfortable as you train • Medicare / HCPCS code = A5500, may be eligible for Medicare reimbursement • Ortholite collar foam • Ortholite heel foam • Ortholite tongue foam • Ortholite® foam insert delivers odor resistance, long term comfort, and superior breathability. • PU strobel board • Rubber outsole • Synthetic/mesh upper • Styles WW847Wt2, WW847GR2, AND WW847GY2 are approved Medicare/HCPCS code = A5500, and may be eligible for Medicare reimbursement.