Dynamic Box Liners: Amazingly effective! A breakthrough in pointe shoe fit and comfort - so revolutionary it's patented! Hugs forefoot around sides and top to make box narrower and prevent painful sliding. Compresses to allow foot expansion in jumping. Expands to hold foot up and in place en pointe. Made from REAL Rogers Corp. Poron 4000 urethane foam. Genuine Poron has the American Podiatric Association Seal of Acceptance.
Fit: #3 box (Medium width), #4/5 box (Large/Wide width)