Here are some alternative phrasings for the line "Milled leather or crazy horse type leather upper" that maintain the same meaning without duplicating semantics:
1. Upper made from milled leather or leather resembling crazy horse.
2. Leather upper crafted from either milled leather or crazy horse style.
3. Upper constructed of milled leather or a crazy horse variant.
4. Crazy horse-like leather or milled leather forms the upper.
5. The upper features either milled leather or a type akin to crazy horse.
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