The Union LA x Air Jordan 4 'Desert Moss' celebrates 30 years of the retailer, reviving a modified AJ4 from 2020. Inspired by 80s and 90s outdoor gear, it features a purple mesh base with yellow suede overlays and turquoise accents on the eyelets and heel. Signature elements include a stitched fold-down tongue, yellow 'UN/LA' tag, and translucent TPU wings, while the midsole offers cushioning with visible air in the heel.