Bell 4Forty MIPS sisak S (52-56cm) matte/glocsatlakozó red/ocean

Bell developed the 4Forty for the rigors of demanding trails. With a full hard-shell design, generous ventilation, built-in Sweat Guide technology, an adjustable visor, added protection from MIPS®, and Bell's comfortable Float-Fit fit, the lightweight 4Forty rivals the heavyweights in the industry. Other models that offer comparable protection, comfort and versatile features often cost twice as much.

Fusion In-Mold Polycarbonate Shell
The EPS foam is injected into the thin microshell shell while it's still in the mold (or "mold", which explains the name) rather than molding it separately and then gluing it on later. This process was first introduced by Bell and is now the standard for all demanding helmets.

Float Fit™
Bell's most advanced helmet fitting system combines comfort and safety in an ultra-lightweight design. Float Fit™ optimizes the fit of the helmet in 2 ways - head circumference and vertical adjustment. To reduce weight and simplify usability, the guide arms enclose the back of the head in a unique way thanks to the “Float” design. This puts the helmet in an ideal position on the head. Simple, light and comfortable.

X-Static® Pads
The X-Static XT2® pads are woven with silver threads. Fast-drying and antibacterial, they work against odors. In addition, the X-Static® pads give the driver a cooling feeling when it is hot and a warming feeling when it is cold thanks to their thermal properties.

GoggleGuide™
An adjustable visor system that works with goggles or sunglasses, whether the visor is on or off.

MIPS
The MIPS® safety system was developed to provide additional protection for helmets in numerous accidents. In certain impact situations, the MIPS system can reduce dangerous forces that might otherwise be transmitted to the helmet wearer's head.

1. Conventional helmets are designed and tested for a straight impact. In most cases, however, the impact is at an angle, which can cause rotational movements for the head.

2. This rotational movement can cause brain injury.

3. The low-friction shell is designed to help reduce rotational movement of the head in certain cases of angled impact.

Straight impact - oblique impact

The brain is typically more sensitive to rotational movement than linear movement because it has a shear strength similar to that of water or gel. When rotational movement causes different parts of the brain to move at different times, the tissues can be stretched, causing concussions or other brain injuries.

Rotational motion is a common cause of concussion and more serious brain injury from an oblique impact to the head. The MIPS system consists of a low-friction shell that is fixed inside the helmet. The low-friction shell is designed to slide slightly inside the helmet in the event of an accident, allowing forces to be directed away from the head. It is said to help reduce the risk of brain injuries.

Most conventional helmets are designed for a straight impact, but in most cases the impact is at an angle. The low-friction shell can reduce the rotational forces of an oblique impact.

Security system with the brain as a model

Unlike conventional helmets, which are primarily designed and tested for a straight impact, the low-friction shell of the MIPS system mimics the brain's own protection system against rotational movement. The cerebrospinal fluid is our natural defense system that allows the brain to move offset to the skull.