Ultra Boost 21 UB21 – S23867

Short Description
Push every stride further. The Ultra Boost 21 UB21 S23867 combines revolutionary BOOST cushioning with a precision-engineered Primeknit+ upper for unmatched comfort, energy return, and stability — designed for those who never stop moving. ⚡👟

Key Features
👟 Silhouette: Ultra Boost 21 (Unisex / Running Shoe)
🧵 Primeknit+ upper delivers adaptive support, flexibility, and breathable comfort
💨 Full-length BOOST midsole provides explosive energy return with every step
🦶 Stretchweb outsole with Continental™ rubber ensures exceptional traction and durability
🎯 Linear Energy Push system enhances stability and propulsion
🌿 Made with recycled materials for eco-friendly performance

Specifications
🆔 Style code: S23867
🎨 Color: Core Black / Grey Two / Solar Yellow
⬆️ Low-top running design for a sleek athletic look
📦 Comes in official Adidas Ultra Boost packaging

Size & Fit
📏 Fits true to size for most runners
🧠 For a slightly roomier fit, go up half a size

Care
🧼 Clean gently with mild soap and a soft cloth or brush
🌬️ Let air dry naturally — avoid heat or direct sunlight