It sounds like you're looking for a "West Coast California 99 Boy's T-shirt." This could refer to a specific design or brand of T-shirt with a West Coast California theme and the number "99" featured on it, possibly referencing a popular style or sports number.
These types of T-shirts are often popular in casual wear, particularly in California-themed apparel or streetwear, and can include elements like palm trees, surfboards, or iconic California locations. The "99" might also be part of a sports or vintage-style graphic.
If you're looking for a specific product or brand, you might try searching through popular online retailers like Amazon, eBay, or clothing stores that specialize in Californian or street-style fashion. Let me know if you have any more details, like the brand name or particular design you're looking for, and I can help guide you further!