During big Stonefly hatches trout can get very particular in what they eat. Over years of studying the flies that work best, Rio has come up with a pick that anglers will enjoy. The RIO Emma's Stone Dry Fly offers a realistic silhouette, two tone bodies, fluttering wings with the right amount of flash, and flat rubber legs that swim back and forth like the real deal. Whether you prefer dead drifts, or twitching these bugs, you'll appreciate the results.