adidas Ultraboost 21 Cloud White (Triple White)
adidas · Clothing & Accessories > Footwear > Sneakers
Era / Decade
2020s (specifically released in early 2021)
Material
Primeknit+ textile upper (recycled polyester/Parley Ocean Plastic), Boost midsole (expanded TPU), Continental Rubber outsole. High-quality performance build.
Condition
Good. Shows visible signs of wear including slight oxidation/yellowing of the translucent side cages and heel counter. The upper appears relatively clean but the outsoles show moderate dirt. Typical for used white knit sneakers.
Demand Level
Strong. Ultraboosts are a staple for both runners and casual users, though demand for the 21 model has slightly dipped since the release of the 22 and Light models.
Resale Value
Estimated Resale Value
$45.00 (Low) - $65.00 (Mid) - $85.00 (High)
Estimated Retail Value
$180.00 - $190.00
Comparable Sales
Recent eBay 'Sold' listings for used Ultraboost 21s in White typically range from $50 to $70 depending on the level of yellowing. Pairs with original boxes and less cage discoloration trend toward the $80+ mark.
Description
These adidas Ultraboost 21 runners feature the iconic Cloud White colorway with a massive Boost midsole for maximum energy return. Designed for both performance running and lifestyle wear, they include a supportive Primeknit upper and a translucent lace cage. The thick heel stack provides exceptional cushioning and a distinct silhouette unique to the 21 model.
Key Features
Highly recognizable silhouette, extremely comfortable Boost technology, eco-friendly Parley Ocean Plastic materials, and a versatile 'Triple White' colorway that is always in demand.
Authenticity Indicators
Distinctive pebble-texture of the real Boost foam, high-quality knit tension, and specific 3-stripe branding on the cage. Confidence: High. Red flags for fakes would be 'cobblestone' flat foam or poor knit details.
Flaws to Note
Yellowing/discoloration of the plastic cages and heel clips (common with age and light exposure). Moderate dirt on the bottom soles. Potential slight pilling on the sock liner near the ankle.
Selling Guide
Where to Sell
eBay and Mercari are best for used sneakers. Poshmark is good for lifestyle shoppers. Facebook Marketplace is ideal for a quick local cash sale to avoid shipping fees on bulky boxes.
Selling Tips
Deep clean the white knit with a sneaker cleaner or gentle detergent before listing. Use a magic eraser on the Boost foam edges to whiten them. Use keywords like 'running shoes', 'gym', 'lifestyle', and 'athleisure'. Take photos in bright, natural light to showcase the whiteness of the knit.