Merrell Siren Cardia Q Form 2 Hiking Sandals Rubber sole Waterproof Lycra neoprene lining for padded comfort Textured EVA Integrated footbed QFORM 2 dual-density midsole with heel-centering technology provides gender-engineered alignment and comfort Air cushion in the heel absorbs for shock absorption and stability Color~ Gray Size~ 8.5 (no tag so done with size chat and measurements) Pre-owned~ good condition. Some signs of wear but lots of miles left! See photos.