This is a simple style tank top made from a stitch I am calling a Triangle Stitch. This creates a mesh texture with alternating direction triangles. The pattern comes in one chest size (120cm/47in), but the length can be customised to fit.

The photos show a striped version of the tank top, but instructions assume a single colour will be used. 400g of aran cotton is needed for the single colour version, or two balls of each colour depending on the width of your stripes (no details of stripe quanitities in pattern)