Just seen the recent pictures and his knees are bare again! OK the socks are pulled up, but I just can't help but think he must be a bit chilly round the legs, poor lamb. I also think they dress him oddly too, I'm all for traditionally non character clothing, but he looks so starchy and uncomfy. If I were them I'd put him in things like these:
Cotton T-shirt Comfy trousers plimsolls