It is braided and will not open because of the flat, strong seem. The special wax formula makes this whipping twine particularly easy to used. The
FSE Waxed Tackle Yarn 0.8mm x 40M Red - TYN-08RSP
Waxed Sail Twine Kit with Needle (2 OZ) - Brown - Whipping Rope
FSE Robline Dyneema Whipping Twine - White - 1.0mm
Sailing - Rope - MyGreenOutdoors
Whipping Twine - Robline
Robline Waxed Polyester Whipping Twine - TY-15WSP
Whipping Twine - Robline
FSE Robline Rope & Whipping Twine
Whipping Twine - Robline
Sailing - Rope – Inflatable Boats Sales