CDC Midge Emerger Colorado Fly Supply Sale! from $1.90 Size 18 20 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. An attractor pattern made famous here in the Rockies! This fly is a must-have for any angler and works wonders on almost all water types. SKU: CDCMIDGE18 Tweet