Sports shoe and method of construction thereof

A sports shoe comprising:

• a shell formed by at least a first shell portion and at least a second shell portion distinct from each other and adapted for being assembled together, the first shell portion including a first peripheral rim edge, the second shell portion including a second peripheral rim edge, and the first peripheral rim edge and the second peripheral rim edge include, respectively, a first joining rim portion and a second joining rim portion adapted to be coupled to each other to fix the first shell portion with the second shell portion, wherein:
• the first joining rim portion includes at least a joining channel including a bottom surface and a plurality of side surfaces, the joining channel being adapted to cooperate with a corresponding at least a joining projection including a concentration head and a body, the joining projection being included in the second joining rim portion,
• the bottom surface is adapted to cooperate with the concentration head and the plurality of side surfaces are adapted to cooperate with the body,
• the body has a section having two surfaces that are complementary in shape to two of the side surfaces of the joining channel,
• the joining channel and the corresponding joining projection are fixable to each other by heat welding the concentration head of the joining projection includes a vertex adapted to cooperate with the bottom surface of the joining channel, the vertex being spaced from the two surfaces of the section of the body, and
• the vertex has an internal angle in a range of 45 to 120 degrees.