Birkenstock Birko Natural Insole (Unisex) nofree Upper Material: Faux leather

Upper Material: Faux leather

Its double braided straps offer full adjustability while the built-in Aetrex Orthotic footbed ensures maximum comfort

Performance Base: Poron for shock absorption

Customizes to your foot with slow recovery memory foam cushioning

Leather lining

Birkenstock Birko Natural Insole (Unisex) nofree Upper Material: Faux leatherBirkoNatural this footbed is wonderful for your feet and is natural, too. The footbed contains natural and renewable resources (e. g. cork, leather, jute). The foot friendly, anatomically shaped footbed naturally cushions and supports the foot. BirkoNatural puts a spring in your every step and reduces the strain on the spine, knees, and hips. Its length means this insole will fit into most types of footwear. Vegetable tanned leather lining Cork latex