Knee'd these pants are definitely pants that you NEED!
 
Add a bit of unique flair with white vinyl on the knees
 
Sizes 00-1 1/2 are cuffed leggings
Sizes 2+ are trackpant style
 
Size guide:
Size 00 - 3-6 months
Size 0 - 6-9 months
Size 1 - 9-12 months
Size 1 1/2 - 12-18 months