Enjoy additional cushioning and support with the comfort of Blundstone XRD™ Footbeds. Easy to insert and remove. All-day arch support. Polyurethane midsole adds comfort. XRD™ in the heel strike zone dissipates heel strike shock. Also handy to firm up the fit as your Blundstone boots wear in. Please note: XRD™ Footbeds are available in full Blundstone sizes only.