EMU Australia Sparkle Boot (Toddler/Little Kid/Big Kid) 100% Synthetic Synthetic sole Shaft measures approximately 6.25" from arch Boot opening measures approximately 10.5" around Glitter and natural Australian Merino wool Merino wool breathes and keeps your feet perfectly warm in winter and cool in summer Reinforced suede heel cup for better fit and support Durable, hardwearing, rubber EMUsole with EVA for comfort and support Superior double stitched seams for added strength