pointe shoes how to stop the sliding of heels?

I have these new pointe shoes, and no matter what I do, keep your heels slide! I tightened the strap, made sure everything is sewn in the right place, tied tight, pulled the cords, but they still slip off my heels when way in or do push-spring! you may be too small? (They're definitely not too big!) My professor suggested Razin (idk how written). What is that? How does it work and what do you do? our performance is in December! and the problem is that I lost my pointe shoes by above I can not just use those! aaah!

my friend has this same problem. what it does is sew a small loop of elastic in the back of his shoes edge. Then put the ribbon through the rubber band to keep the back of the shoes up. Hope that helps =]

WHERE THE $%^& IS MY SHOE

Papush Blue Infant Walking Shoes $75 These blue Papush infant walking shoes feature roomy, rounded toes and are ideal for everyday use. The closure straps allow you to get your youngster in and out of these shoes with ease. Flexible non-marking outsoleCushioned insoleHook and loop strap closureMid-bootie styling maximizes supportLovely textured leather upperColor: BlueMaterials: Leather

Papush Pink Leather Infant Walking Shoes $56.09 Have her walking in style with these pink leather walking shoes by Papush. The shoes feature a mid-bootie design for extra support while she is learning to maneuver through her world.Give your little girl style and comfort with these Papush shoesLittle walking shoes feature a cute textured leather upper Girl's shoes have a mid-bootie style for extra support for walkingRoomy enough for her feet to breathRounded toeCasual walking designColor: PinkClick here to view our shoe sizing guide Leather upper and outsoleImported

Papush White Infant Walking Shoes $71.12 These ivory Papush infant walking shoes feature roomy, rounded toes and are ideal for everyday use. Velcro straps allow you to get your youngster in and out of these shoes with ease. Flexible non-marking outsoleCushioned insoleVelcro strap closureMid-bootie styling maximizes supportLovely textured leather upperColor: IvoryMaterials: LeatherDimensions:6-12 months: 5.1 inches12-18 months: 5.6 inches18-24 months: 6 inches24-36 months: 6.3 inches