Removable Multifunctional Waterproof Ventilation Cap

The problem

Outdoor headwear faces two opposing demands. Vents that release heat also let rain reach the wearer’s head, while fully sealed caps trap hot gas and steam during physical activity. Adding separate goggles or a face mask means carrying extra items that are easily lost. Attaching them permanently makes the cap heavy and limits its use to one specific weather condition. Buyers need a single headwear platform that manages moisture, blocks rain, and adapts to changing environments without requiring multiple separate accessories.

The solution

This cap addresses those issues by separating the rigid support structure from the flexible cap body.

1. A hat stand consisting of a C-shaped frame (31), a lower press strip (32) with a cavity ring (33), a ceiling molding (12), and a crown (18) forms the base. The lower press strip is fixed on the C-shaped frame and wraps around the crown.
2. The cap body (11) is made of biogenic opal rubber (except for the membrane). Its upper and lower surfaces have a corresponding concave-convex shape, allowing it to be pressed securely between the lower press strip and the ceiling molding.
3. Several stomata pass through the cap body. An interlayer within the cap body holds a waterproof ventilated membrane over each stoma.
4. Intensive grooves distributed in a net pattern on the inner side of the cap body channel hot gas and steam from the head toward the stomata for discharge.
5. A brim (17) with sunglasses lenses (16) sits at the front, where goggles (14) are also located. A semilune extendible flake (21) is positioned at the rear end.
6. The brim and the extendible flake attach to the cap body using a fixation device (19), which is either a snap-fastener or a magnetic sheet wrapped inside.

When the front is pulled down and the extendible flake is flipped up simultaneously, they form a combined eye-protection and mask configuration. Because the extendible flake remains attached, the cap stays fixed on the head even when the main cap body is detached. A crack running along 50%-60% of the cap body’s lower edge perimeter allows the waterproof ventilated membrane to be replaced. Bulge structures (13) on both sides of the cap body contain apertures and function as air bags. Triangular pyramidal protrusions (15) are located in the middle of the brim and on one side of the C-shaped frame. The crown has connected through-holes on its lower and upper sides; the lower side through-hole sits within the interlayer, while the upper side through-hole exposes outside the cap body.

Who it is for

• Outdoor apparel brands looking to add a convertible headwear piece that handles both rain and sun without requiring separate SKUs for each season.
• Amazon sellers in the sporting goods category who need a distinct product with visible mechanical features—like the detachable body and folding mask—for listing images and demonstrations.
• Wholesale distributors for workwear and safety gear seeking headwear that combines basic splash protection with integrated eye coverage for light outdoor tasks.
• Promotional product suppliers wanting a customizable cap platform where the silicone body color and membrane type can be specified per client order.

How it works

The main parts

Operating steps

1. Assemble the cap - press the cap body (11) into the lower press strip (32) using the ceiling molding (12). The concave-convex shapes lock together.
2. Ventilate - hot gas and steam from the head enter the intensive grooves on the inner side, travel to the stomata, and exit through the waterproof ventilated membrane. Rain cannot pass back through the membrane.
3. Configure for sun - leave the brim (17) and sunglasses lenses (16) in place. The goggles (14) remain stowed, overlapping with the lenses.
4. Configure for wind or dust - pull down the front and flip up the semilune extendible flake (21) at the rear. They meet to form eye protection and a mask. The fixation devices (19) hold them in position.
5. Remove the cap body - detach the cap body from the lower press strip. The extendible flake keeps the frame secured on the head. Replace the membrane through the crack on the lower edge if needed.

Applications

Hiking and trail walking

Hikers encounter sudden rain and high exertion levels. The waterproof ventilated membrane blocks rain while the intensive grooves channel sweat vapor outward, preventing the head from overheating during climbs.

Cycling and commuting

Cyclists face wind, dust, and changing light. The front goggles and sunglasses lenses provide eye coverage, while the rear extendible flake flips up to shield the lower face from road debris.

Outdoor maintenance and yard work

Landscapers and groundskeepers move between sun and showers. The removable cap body can be taken off and wiped clean, and the air-bag bulge structures on the sides help maintain the cap’s shape during movement.

Fishing and boating

Anglers deal with glare and splashing water. The brim’s sunglasses lenses reduce glare, and the waterproof membrane prevents spray from soaking through the cap body during rough conditions.

Where it is less suitable

• High-impact sports - the C-shaped frame and silicone body are not rated as protective helmets for activities like climbing or contact sports.
• Formal or uniform dress codes - the visible mechanical components, bulge structures, and folding mask give it a technical appearance unsuited for corporate or formal settings.
• Extreme cold environments - the stomata and ventilation grooves prioritize airflow, making this cap less appropriate for retaining heat in freezing temperatures.