BEST SELLER! Warm-up booties for ladies and men designed by Bloch Stars and former American Ballet Theatre Principal Dancers Irina Dvorovenko and Max Beloserkovsky. Warm Up Booties keep feet warm without the need to remove one's ballet shoes. Encasing feet in a softly padded, durable rip-stop nylon, the booties not only protect the foot but offer longevity to ballet shoes. Warm-up boots retain heat and encourage the muscles to warm through. A velcro strap secures the booties, whilst the padded outsole is covered in a non-slip PVC.