Swim suit, particularly for competition swimming

1. Swim suit, particularly for competition swimming, comprising an outer shell suitable to cover at least part of the body trunk and of the legs of a swimmer, wherein the outer shell is made of a flexible stretchable fabric having, in at least a region of the outer shell, a non-linear tensile stress-strain behavior with:

a base strain range in which the tensile strain of the fabric is less than a transition strain value, and

an overstrain range in which the tensile strain of the fabric is greater than the transition strain value, wherein a tensile modulus of the fabric in the overstrain range is greater than a tensile modulus of the fabric in the base strain range.

2. Swim suit according to claim 1 , wherein in said region of the shell, additional reinforcement fibers are woven into the fabric in a multiple bent configuration such that:

in said base strain range, the reinforcement fibers can bend or straighten out without elongation and without substantially contributing to the tensile stiffness of the shell,

in said overstrain range, the reinforcement fibers are elongated and contribute to and increase the tensile stiffness of the shell.

3. Swim suit according to claim 2 , wherein said reinforcement fibers woven into the stretch fabric of the swim suit have a greater tensile stiffness than base fibers of which the fabric is made.

4. Swim suit according to claim 2 , wherein the reinforcement fibres comprise carbon fibers distributed in and woven into the fabric in a manner that individual reinforcement fibres straighten out and undergo axial fiber strain at different overall strain values of the fabric, thereby determining a transition strain region in which the stretch stiffness of the fabric gradually changes from a base tensile modulus to an overstrain tensile modulus which is greater than the base tensile modulus.

5. Swim suit according to claim 1 , wherein the overstrain tensile modulus of the fabric is greater than two times the base tensile modulus.

6. Swim suit according to claim 5 , wherein the overstrain tensile modulus of the fabric amounts to 3 to 5 times the base tensile modulus.

7. Swim suit according to claim 1 , wherein the fabric comprises base threads woven together with the reinforcement fibers, said base threads being formed by twisted multifilament elastomer yarn and said reinforcement fibers comprising carbon added polyamide multifilament yarns.

8. Swim suit according to claim 7 , wherein the base threads of the fabric are polyamide-Lycra® threads in which a polyamide fiber or fiber strand is twisted about a Lycra® core, and the reinforcement threads are polyamide-carbon-Lycra® threads in which a polyamide fiber or fiber strand is coated with carbon and the carbon coated polyamide fiber or fiber strand is twisted about a Lycra® core.

9. Swim suit according to claim 8 , wherein the reinforcement threads are weaved in the fabric such that 1 warp reinforcement thread is provided per each 54 warp steps and 2 weft reinforcement threads are provided per each 43 weft steps.

10. Swim suit according to claim 1 , in which the weft direction of the fabric is oriented along a hoop direction about the body trunk and about the legs of the wearer of the swim suit, and the warp direction of the fabric is oriented in a longitudinal body direction of the wearer of the swim suit,

wherein the fabric comprises a greater amount of directional reinforcement fibers in the weft direction than in the warp direction and has, in the overstrain range, a greater tensile stiffness in the weft direction than in the warp direction.

11. Swim suit according to claim 1 , in which said fabric forms a plurality of micro-channels adapted to let air pass through the fabric.

12. Swim suit according to claim 1 , comprising one or more elastically stretchable tapes attached to an internal surface of the outer shell.

13. Swim suit, according to claim 1 , wherein, in at least a region of the outer shell, carbon fibers are woven into the fabric.

14. Swim suit, particularly for competition swimming, comprising an outer shell suitable to cover at least part of the body trunk and of the legs of a swimmer, wherein the outer shell is made of a flexible stretchable fabric having reinforcement threads and base threads, the base threads being woven together with the reinforcement threads,

said base threads being polyamide-Lycra® threads comprising a Lycra® core and a polyamide fiber or fiber strand twisted about the Lycra® core, and

said reinforcement threads being polyamide-carbon-Lycra® threads comprising a Lycra® core and a polyamide fiber or fiber strand coated with carbon and twisted about the Lycra® core.