Twice as durable, half the stretch. NORTH SAILS stands for unsurpassed quality that guarantees a longer life for our sails. The triple zig-zag seams significantly contribute to this. And they don't come, as usual, in a single but in a double version! They cover all exposed crash areas that would otherwise be damaged. The result is higher tear resistance and a reduction of stretch by up to 50% as a result of the second seam, plus more profile stability and performance. Only the DOUBLE.SEAM.TECHNOLOGY by NORTH SAILS can deliver this!