Lightweight, breathable mesh upper|TPU heel overlay for added durability & support|Adjustable hook & loop strap closure for easy on & off|Full-length EVA sockliner for added comfort & a custom fit|Cushioned EVA midsole for all-day comfort|Lightweight, durable outsole - Style #: 3027105|Lace type: Standard tie with hook & loop strap|Imported The Under Armour Infant Boys Surge 4 AC Running Shoes in this Castlerock with Anthracite colourway. These shoes are going to feel cushioned and comfortable, but also light and breathable. Why? Because when you never slow down, that's what you need. Lightweight, breathable mesh upper TPU heel overlay for added durability & support Adjustable hook & loop strap closure for easy on & off Maximum breathability - a performance mesh upper delivers increased ventilation, giving the runners a lightweight and breathable feel in every step Ultimate durability - featuring a TPU heel overlay for added durability and support, these infant shoes are designed to go the distance come playtime Superior comfort - with enhanced cushioning around the ankle collar, these boys shoes let the wearer enjoy a more comfortable, supportive step Responsive sports shoes - a cushioned EVA midsole gives lightweight shock absorption, and a full-length EVA sockliner provides comfort