Ultra Boost 21 UB21 – S23837

Short Description
Run with power, style, and precision. The Ultra Boost 21 UB21 S23837 delivers superior comfort with its full-length BOOST midsole and adaptive Primeknit+ upper — engineered for athletes and everyday movers who demand the best. ⚡👟

Key Features
👟 Silhouette: Ultra Boost 21 (Unisex / Performance Running Shoe)
🧵 Primeknit+ upper provides breathability, flexibility, and a supportive fit
💨 BOOST cushioning delivers high energy return and responsive comfort
🦶 Stretchweb outsole with Continental™ rubber ensures outstanding grip and durability
🎯 Linear Energy Push system enhances forward momentum and stability
🌿 Made using recycled materials — part of Adidas’ sustainable initiative

Specifications
🆔 Style code: S23837
🎨 Color: Core Black / Cloud White / Grey Six
⬆️ Low-top running silhouette
📦 Packaged in official Adidas-style Ultra Boost box

Size & Fit
📏 Fits true to size for most wearers
🧠 For a looser fit, consider going up half a size

Care
🧼 Wipe with a damp cloth using mild soap
🌬️ Allow to air dry naturally — avoid direct heat or sunlight