• Here are a few options
• all suitable for South American Spanish
• with slight variations in nuance: 1. **Marcas y decoloración visibles en la parte trasera.** * (Most direct and common translation) 2. **Manchas y decoloración visibles en la espalda.** * (Uses "manchas" which implies stains
• and "espalda" is very natural for the back of a shirt.) 3. **Se aprecian marcas y decoloración en el reverso.** * (More formal
• "se aprecian" means "are noticeable/can be seen
• " and "reverso" is a good general term for the back of an item.) 4. **Defectos visibles de marcas y decoloración en la parte posterior.** * (More explicit about "defects
• " and "parte posterior" is another way to say "back part.") For a football shirt
• I'd lean towards **Option 2** or **Option 1** as they are very clear and natural.

Características:

• Número 9 estampado en la parte inferior delantera
• Motivo Nike y escudo del club termosellados, cintura elástica, etiqueta de lavado estampada para cero distracciones,