Section 2: Equipment
2.1 Skis
- Maximum length: 146% of the athlete's body height (Article 222.1, ICR). Athletes with a Body Mass Index (BMI) below 21.0 receive a ski length reduction of 0.125 m for each 0.5 BMI unit below the threshold.
- Width: 105–118 mm (4.1–4.6 in) at the binding area. Tip width may differ but must follow the approved camber profile.
- Weight: Minimum 4.0 kg (8.8 lb) per pair including bindings.
- Surface: Skis must be flat — no concave, convex, or stepped bottom surfaces. Running surface must be smooth without ridges or grooves that create aerodynamic advantage.
- Binding: Binding must allow the heel to lift freely. Maximum binding height from ski surface: 65 mm (2.56 in). Front binding position: maximum 57% of total ski length from tail.
2.2 Jumping Suit
- Material thickness: Maximum 6 mm (0.24 in) at any measured point.
- Air permeability: Minimum 40 l/m²/s (±5 l/m²/s tolerance). Measured at multiple points during random equipment checks.
- Fit tolerance: Maximum 2 cm (0.79 in) from body contour at any measured point when standing upright (Article 426, ICR). No aerodynamic aids, flaps, or extensions permitted.
- Construction: Single-piece suit covering body from wrists to ankles. Seams may not create pockets or channels that trap air.
2.3 Helmet and Boots
- Helmet: FIS-approved helmet mandatory. Smooth surface with no aerodynamic modifications, wings, or extensions. Visor or goggles permitted but must not extend beyond helmet profile.
- Boots: Maximum boot height 30 cm (11.8 in) from sole. Must support the forward lean angle required by the binding system. Boot sole length must match binding specifications.
2.4 BMI Rule and Equipment Correlation
Introduced to combat dangerous weight loss practices, the BMI rule links maximum ski length to body mass. Athletes must weigh in before competition. A BMI of 21.0 or higher allows maximum ski length (146% of body height). For each 0.5 BMI unit below 21.0, the maximum ski length is reduced by 12.5 cm, limiting the aerodynamic advantage of underweight athletes and protecting athlete health.