Spray Cast Comfort Spray inside the cast through a thin applicator tube. The cold talc powder-based spray will blast the irritated skin with a cold sensation that will provide an instant relief from the heat and moisture inside the cast. Each spray provides hours of relief from itching and discomfort. With regular use, casts can smell as good as new, even after weeks of wear. NOTE: Due to Federal regulations, aerosol cans can NOT be shipped via air. Free Shipping is via USPS and ground transportation may add several days (up to 3 weeks) to typical delivery times. Expedited orders will be shipped via FedEx and will arrive within 5 business days.