The 'Tranquil' thong is a streamlined sandal with a feminine twist. ; Two ribbons of buttery-soft leather are tied into a single, delicate knot. ; Perforated, suede insole allows your feet to breathe with ease. ; Matching midsole accents the authentic, handsewn cobbler stitch construction. ; Earth features unique Kalsø Negative Heel Technology for natural body alignment. ; Anne Kalsø discovered that positioning the heels below the toes naturally aligns the body, just like the Yoga Mountain pose. ; This natural posture and alignment relieves fatigue for people who are on their feet all day. ; 9.00 oz. ; Product measurements were taken using size 9.5. Please note that measurements may vary by size.