FLEXIBODY can be used for many Flytying techniques and fly patterns such as Czech Nymph backs, wing buds and bodies. Flexibody is thicker than other similar products which make it better for segmentation when wrapped as an abdomen. VN Flexi-Body has 90% memory enabling it to retract, unlike other products. To make a realistic abdomen, simply tie in, wrap, then tie off for great segmentation.