Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
“the discovery of a new type of synthetic, a nylon filament known as Antron made by Du Pont, provided fresh hope. The material had two major qualifications: it was translucent and it reflected light. The filaments underwater looked perfect; by every laboratory measurement they simulated the air bubble exactly.”