Elastics on pointe shoes?

I would definitely put elastics on! If this problem still happens after you put elastics on there are usually 2 or 3 options. One would be if the heel slipping doesn't happen too often is sewing the end of the elastics by your heel (uming you do criss cross elastics) closer together. Another is sewing a 3rd elastic across the front of your heel. The third is ordering the shoe with a higher heel if that is possible.