RIO Products Olive Caddis Dry Flies Assortment - Caddis are active during the summer months and behind tan, the olive colored varieties are the next most prevalent. In some rivers, caddis are a huge portion of the trout's diet. This assortment consists of our bestselling sizes and patterns that represent olive colored Caddis dries. This assortment includes the following flies: Elk Hair Caddis – Olive, Size 14 Elk Hair Caddis – Olive, Size 16 X-Caddis – Olive, Size 14 X-Caddis – Olive, Size 16 X-Caddis – Olive, Size 18 Hen Wing Caddis – Olive, Size 14 Hen Wing Caddis – Olive, Size 16 RIO's Foam Run Caddis – Olive, Size 14 RIO's Foam Run Caddis – Olive, Size 16 RIO's Body Double Caddis – Olive, Size 16 E/C Caddis – Olive, Size 14 E/C Caddis – Olive, Size 16