A Halloween costume particularly adapted to accommodate changes in weather and climate is disclosed. The Halloween costume may be sold in varied geography and be worn regardless of seasonal and whether variation. The inventive Halloween costume comprises several garment member portions which completely define the appearance of the Halloween character. The insulative material is disposed over at least a portion of the first garment base member portion. Another portion of the costume comprises a venting material which functions as a ventilator for the Halloween costume. At least one decorative member is secured to the Halloween costume. The decorative member further outlines the appearance of the Halloween character.