Early Sea Caves Sock
There are 3 socks in the Goo Lagoon caves. One is in the goo, and the other two are accessible without the freezy fruit.
In speedruns, Patrick enters the caves for the first time at the end, thanks to Goo Lagoon Sequence Break Glide. After collecting the golden spatula, Patrick can throw the freezy fruit into the goo and collect all three socks in one go.