Early bird pricing. The lofty Acorn memory foam midsole over a comfort cushion layer of featherweight EVA combines with an enhanced raised heel and arch for stability, support, and total comfort. The Talara Mule has a non-slip weatherproof sole for indoor/outdoor wear.Global reach.Acorn original embroidery! These beautiful slippers feature an authentic 100% boiled wool upper with original embroidery detail. They are fully lined in soft sherpa fleece.