DS is about to grow out of his pre-walkers. They are a bit thin-soled for this time of year outdoors so I'd be happy with something a bit thicker, but it needs to be as flexible as possible as his visual impairment means that he trips over everything and being able to feel the surface under his feet well really helps keep him upright. Clarks and Start-rite stop pre-walkers at a size 5. Has anyone found anything else good?