Designed with circular principles in mind, these cozy, indoor-outdoor slippers feature Smartwool&';s Second Cut(TM) fleece-crafted with pre-consumer SmartwoolA(R) Merino wool scraps. The rubber sole adds protection, while the collapsible heel lets you choose between a mule or a full slipper. A recycledMerino lined foam insole adds cushy comfort for cabin days, coffee runs, or winding down after big adventures.