This closed cell Fly Foam is ideal for terrestrial imitations.
Most packages include two sheets each of 1/8″ (3mm) and 1/16″ (1.5 mm) foam.
Colours described as 3mm and 2mm (thin) have 3 sheets of same colour and same thickness.
Fly foam is the perfect choice for terrestrials of all types. It resists thread cuts and is supple and elastic enough for the smallest fly patterns.