The nylon knit upper is machine washable

our performance zone is knit like a second skin of Merino Wool for moisture-wicking

featuring a nubuck upper and Merrell air cushion underfoot for extra support

with hidden gore for adjustability

along with the Curves & Pods® dual density removable footbed

Women's Terran 4 Backstrap Black LACE UP The nylon knit upper isGive your feet the comfort they deserve while you are going places wearing Merrell Terran 4 Backstrap Sandals that come with an adjustable backstrap closure for a secured fit. The sandals are expertly crafted with a full grain leather or recycled textile upper, recycled microfiber lining, and recycled microfiber wrapped insole. The FloatMax foam integrated insole are designed for a soft and smooth underfoot experience.