These were made to Dan's exacting specifications (what did I expect? He *is* an Engineer, after all). Reinforced heels so they don't wear out too quickly. Long enough to fold over, but not so long that they need to be scrunched down. Not scratchy. Colors that won't show dirt too easily. Just long enough for his toes, but not too long. Most importantly, they brought a big smile to his face, which brought a smile to *my* face.
Just realized that picture barely shows any detail. They look a bit like foot shaped blobs of oatmeal, don't they? In person they look much less like breakfast cereal, honest.