Use code SUMMER25 for 25%* off at checkout. *Excludes new arrivals and already discounted items.
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Use code SUMMER25 for 25%* off at checkout. *Excludes new arrivals and already discounted items.
ACALP04F
Lenses: Not included
Frame: Matte Black / Tan
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Triloid™ Nylon Frame
Light Weight
Prescription ready
Ventilation Vents
Fit
High Wrap: Base Curve 8
Head Size
Medium - Large
Frame Width
144 mm
Bridge width
15 mm
Lens Width
Temple Length
127 mm
ANSI Z87.1
ISO 12312-1
Side shields included

Triloid™ Nylon is the toughest non-metal material available. It not only gives you lightweight comfort, but it also extremely strong. Among other, it is thanks to this highly durable material that WX eyewear can withstand the rigorous safety tests that we certify all our eyewear to. It might have a light and plastic feel, but TriloidTM Nylon is much stronger and of a higher quality.
The eyewear can be fitted with prescription lenses to match your optical needs. If you need prescription lenses, please reach out to a Wiley X optician near you and they will assist you in constructing prescription lenses for your WX eyewear, either directly into the lenses or using a prescription insert, depending on your Wiley X eyewear model.
The base curve refers to the curvature of the lenses, which defines how much the frame wraps around your face. The higher the base curve, the larger curvature. Wiley X operates with base curve eight and base curve six, however we do have some models that has a base curve between and under these two values.
Base curve eight means that the eyewear has a large curvature and a high wrap fit, meaning that the eyewear will enclose your face to a greater extent, which also will ensure you better protection against light in your peripheral field of view.
Base curve six lenses that are less curved than eyewear with a base curve eight. They have a medium wrap fit, meaning that they do not enclose your face in the same way, but rather sit flatter against your face. This makes them fit more face types and sizes better.
Picking out the perfect pair of eyewear or sunglasses can be difficult, because how do you know if it will fit your head? First step is to determine your head size. If you know the circumference (the measurement around your head), it will be much easier to know if the eyewear will fit you. Simply, take out a tape measure and measure the circumference of your head. Compare the number you get with the table you see above.
For instance, if your head has a circumference of 58 cm you have a large head size, and your face should be able to fit all our models that covers this head size. Many of our models have more than one fitting head size, for instance M-L.
This means that if your head size is either medium or large, you will be able to fit this model.
The frame width refers to the distance between the ends of your frame, including the hinges. To achieve the best result, both in terms of look and fit, the frame width and the width of your face, should correspond fairly. If the frame is too wide, you can risk that the eyewear will look too oversized to your face, and there might be a greater risk for the eyewear to slide down and your view being distorted. A too narrow frame can on the other seem too small for your face and pressure against your temples, potentially leading to headaches.
The bridge width is the measurement between your two lenes, meaning the space where the frame fit against your nose. It is important that the bridge of your eyewear fits the width of your nose. If the bridge width is too wide, the eyewear will slide down your nose. If the bridge width is too narrow, the eyewear will pressure to much against your nose, causing pressure points that can be uncomfortable.
The lens width, also called eye size, refers to the horizontal width of one of your lenses from the one side to the other, without including any of the frame. As the lenses define your field of sight, this is the most important measurement to ensure that the frame fits your eyes and face. The lenses are optimal, if they are as wide as your face and do not rest on your cheeks.
The temple length (arm length) is crucial for a secure fit. If they are too long to your face, the eyewear will slide right of. If they are too short, the eyewear will pressure against your temples, ears, and nose. The temple length is measured from the screw to the temple tip, including any bend the design might have.
ANSI Z87.1 tested means that the frame and lenses meet or exceed specific safety ratings set by the American National Standards Institute (ANSI), who has developed a certification system for safety eyewear in the US. As an American brand, we test our eyewear to pass a high velocity impact test and a high mass impact test, as dictated by ANSI.
The high velocity impact test demands that the frame and lenses must withstand the impact of a 6,35 mm steel ball fired at 164,6 km/h, while remaining intact. The high mass impact test demands that the frame and lenses must remain intact while withstanding a 500 grams pointed projectile that is dropped down on the eyewear from a height of 127 cm.
ISO 12312-1 determines the technical guidelines for the development and testing of sun darkening eyewear with the purpose of protecting the user against potentially damaging levels of sunlight. Specifically, ISO 12312-1 pertains to the safety demands for sunglasses in reference to protection against sun rays during normal wear and driving.
Technical, the standard set requirements to
If you are looking for eyewear with specific properties like anti-fog, scratch resistance, mechanical and ballistic resistance you should choose eyewear that is tested to these properties.
ISO is one of the standards that can be met to fulfill the requirements of EU Directive 2016/425 in order to affix the CE marking on the product.
With the side shields, you can attach additional protection of your vision to your sunglasses. With the side shields on you add extra protection of your vision in the peripheral area, meaning protection from fragments and the like, which you are not given without the side shields on due to the flat design of the eyewear.
The side shields can also be permanently installed, adding lasting protection of your vision in the peripheral area. Simply add the included plug to make the sides shields permanent. However, be aware that once the plug has been inserted, the side shields cannot be removed again.
The WX Alpine isn’t just built for performance - it’s built to take over. Designed with an aggressive, purpose-driven expression, this frame means business in the harshest conditions. Every detail is engineered for strength, stability, and uncompromising protection when it matters most.
The low-profile polymer frame is lightweight but refuses to break, and semi-hooked temples grip like a clenched fist, locking in when the action kicks up. Rubber nose pads and temple tips keep it glued to your face, whether you’re tearing through terrain or grinding through the mission. And when the heat rises, Venturi Suction technology optimizes airflow to prevent fogging during intense activities like cycling, running, or tactical operations.
From high-speed pursuits to unforgiving environments, WX Alpine delivers clarity, control, and confidence - every single time.
Purpose-built for uncompromising performance, the bold frame design is engineered for maximum resilience and functional strength. The low-profile polymer construction keeps the sunglasses lightweight without sacrificing durability, making them ready to withstand impact, pressure, and relentless use in demanding environments.
Integrated Venturi channels actively draw air through the frame, optimizing internal airflow to reduce fogging and maintain crystal-clear vision during high-intensity activity. Whether you're pushing your limits on the road, trail, or in operational settings, visibility remains sharp and consistent.
Rubber temples and nose pads with hydrophilic properties ensure a secure, no-slip fit that improves as moisture increases. As intensity rises and sweat builds, the grip strengthens—keeping the frame firmly in place when movement becomes fast and unpredictable.
Completing the design are extra-thick 2.5 mm shatterproof lenses, tested and certified to the MIL-PRF-32432A Ballistic Impact Standard.
Delivering military-grade impact resistance, they are built for extreme durability - resisting scratches, shielding against debris, and providing full UV protection in all conditions.
Can be made with prescription lenses. To find a Wiley X partner near you, who can make prescription lenses, use our Store Locator to find an optician.
Superior lens technology. Filter out harmful light and elevates your visual performance by enhancing colors and contrasts and increasing clarity.