adidas UltraBoost 21 "Black Iridescent"
The adidas UltraBoost 21 "Black Iridescent" (GX5236) released Sunday, October 31, 2021.
Original retail (2021): $180 · Lowest resale ask: $104 on GOAT (Nov 14, 2026)
Colorway: Core Black/Core Black/Grey Five · Style code: GX5236 · Release date: October 31, 2021 · Lowest resale ask: $104 · Availability: Available now
Source: GOAT's catalog · stores checked Nov 14, 2026, 4:22 PM ET
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