Fitflop Fitflop Gem Trim Bts Ld54. Ergonomically engineered to help optimize your body's alignment, natural movement & energy. Light pressure-diffusing Microwobbleboard midsole, triple-density cushioning follows 3 footstep stages (firm heel/soft middle/medium at toes). Natural arch support. Slip-resistant rubber outsole with grip suited to everyday use. This style has a standard width fit.