Footwear / adidas / ZX / adidas ZX 1K Boost Triple Black (Kids)
adidas ZX 1K Boost Triple Black (Kids) G58921
Triple Black (Kids) · 2021
GS = grade school sizes, EU 35½–40
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Where to buy
Sizes in stock · Across the shops below · pick yours
Verified delivery destinations
Spain.
The target offer says it is sold and shipped by an associated seller. Spartoo says partner products ship only to mainland Spain. The seller sets its own delivery fee and terms, so the general Spartoo rates do not apply.
Check address and product restrictions at checkout.
Verified delivery destinations
Spain.
The terms define delivery in Spain and exclude the Canary Islands, Ceuta, and Melilla. They also exclude some hazardous goods from island destinations. Standard delivery dates depend on the product; express delivery is at most two working days when offered.
Check address and product restrictions at checkout.
Verified delivery destinations
Spain.
This offer ships to mainland Spain through Sports Sellers ES. Sellers set separate terms; marketplace items cannot ship to or return in Sprinter stores.
Check address and product restrictions at checkout.
Price, last 90 days
Lowest recorded shop price · EUR90-day low: 49,50 €; average: 64,34 €. Today from 49,50 €, the lowest we have recorded.
Fact sheet
Details
- Brand
- adidas
- Style code
- G58921
- Colourway
- Triple Black (Kids)
- Released
- 1 Feb 2021
- Retail price at launch
- ≈ 80 $
- Manufacturer
- adidas BV (Amsterdam), Hoogoorddreef 9-A, 1101 BA Amsterdam, NL
- Gender
- Kids
Availability by size
5 sizes are in stock, from 36 to 38⅔. The cheapest shop changes with the size: 2 different shops today, so pick your size before you compare.
Size conversion
EU · US · UK · A conversion chart, not stockScroll within the table to compare sizes.
This table scrolls within its region. Focus this region and use the arrow keys to compare sizes.
| EU | US | UK |
|---|---|---|
| 28 | 10.5K | 10K |
| 28 1/2 | 11K | 10.5K |
| 29 | 11.5K | 11K |
| 30 | 12K | 11.5K |
| 30 1/2 | 12.5K | 12K |
| 31 | 13K | 12.5K |
| 31 1/2 | 13.5K | 13K |
| 32 | 1Y | 13.5K |
| 33 | 1.5Y | 1Y |
| 33 1/2 | 2Y | 1.5Y |
| 34 | 2.5Y | 2Y |
| 35 | 3Y | 2.5Y |
| 35 1/2 | 3.5Y | 3Y |
| 36 | 4Y | 3.5Y |
| 36 2/3 | 4.5Y | 4Y |
| 37 1/3 | 5Y | 4.5Y |
| 38 | 5.5Y | 5Y |
| 38 2/3 | 6Y | 5.5Y |
| 39 1/3 | 6.5Y | 6Y |
| 40 | 7Y | 6.5Y |
Reference conversions only; this chart does not measure your foot or describe product fit.
About this product
The ZX 1K Boost arrived in 2021 in a Triple Black finish, keeping every surface within one deep colour. All-black is straightforward to wear and hides scuffs and marks better than mixed palettes, though textures in the material do the work of adding variation. This kids' pair launched at 80 USD, with Boost cushioning underfoot as part of the ZX line.
Same shoe, other colours
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|---|---|---|---|---|---|
| From today | 49,50 € | 52,00 € | 71,95 € | 59,40 € | 92,00 € |
| Shops | 2 | 27 | 25 | 25 | 25 |
| Released | 2021 | 2018 | 2025 | 2025 | 2024 |
| RRP | ≈ 80 $ | ≈ 100 $ | ≈ 100 $ | ≈ 100 $ | ≈ 150 $ |
| Material | — | Leather | Leather | Leather | Textile |
From reselling sneakers to checking prices. In Ibiza since 2019; since September 2026 we sell nothing.
Shop prices and available sizes, checked daily. The shelves are empty; the spreadsheet is not. The story