For a kid growing up in New Jersey, the Ocean Pacific brand represented a connection to the beach culture of Southern California that I could get at the mall.
I had a few Op pieces of clothing, but my favorite was a white short-sleeved Tshirt that had a brightly colored swirly geometric pattern on the front and a cutout circle on the back. My back skin had never seen the light of day until that Op shirt with the cutout. I thought I was pretty dang cool...until going out in the shirt on a bright, sunny day without sunscreen. The perfectly round circle of sunburn that resulted further emblazoned the memory of this shirt in my mind. An emblazoned memory from an emblazoned back.
My favorite OP shirt (I believe purchased at JC Penny's) was a black short sleeve that you rolled the bottom on the sleeve up and it was neon pink inside. It had a thin squiggly line across the chest in all neon colors that ended at the OP logo. Loved that shirt
I had two OP shirts but the one I remember best was a long sleeve red shirt with a small logo on the left breast, and pin strips across the chest. I wore the heck out of that shirt, until I grew out of it. I'd still wear that west coast / surfer look in the early nineties when I was getting shirts from PAC-SUN at the mall. None of that really measured up that the original OP shirt though.
I dug OP but my favorite was T&C Surf Design. I loved all of the characters (Thrilla Gorilla, Wave Warrior, etc) and the antics depicted. The shirts were a bit pricey so I only ever had 2 but I wore them until they didn't fit anymore.