Tank

A tank comprising:

• a liner comprising an inner shell;
• and
• a reinforcing layer covering an outer surface of the liner;
• wherein
• the reinforcing layer is formed by continuously winding resin-impregnated fiber bundles around the liner,
• the reinforcing layer comprises a hoop layer placed in a side of the liner, and a helical layer,
• gaps are formed between adjacent bundles of the resin-impregnated fiber bundles wound in the hoop layer,
• there is at least one site where the resin-impregnated fiber bundles are wound without forming a gap between adjacent bundles in the helical layer, and
• resin in the resin-impregnated fiber bundles has a resin toughness value of not less than 1.0 MPa·m0.5, that satisfies:
• 0≤Lmin/W<0.5 and 0.01<Lmax/W<0.5
• wherein Lmin represents a minimum value (mm) of the gaps, Lmax represents a maximum value (mm) of the gaps, and W represents an average width (mm) of the resin-impregnated fiber bundles adjacent to the gaps.