Trakker Tempest 150 Skull Cap

At Gerry’s Fishing, we know that the British weather is anything but predictable. One minute you’re enjoying a sunset, and the next, you’re dealing with a persistent drizzle that wants to find its way into your doorway. The Trakker Tempest 150 Skull Cap is the ultimate tactical upgrade for your shelter. It doesn’t just add a protective peak; it transforms your bivvy into a dual-skin sanctuary, tackling the two biggest enemies of the long-stay angler: condensation and heat loss.

By adding this “second skin” to the top of your Tempest 150, you create an air gap that significantly reduces the “internal rain” caused by condensation during cold nights. In the summer, it acts as a heat barrier, keeping the internal temperature much more bearable. The beauty of the Skull Cap design is its simplicity—unlike a full overwrap, this can be left in place during pack-down, making your next setup even faster.

Weather-Beating Performance

Manufactured from Trakker’s upgraded 10,000mm Hydrostatic Head polyester, this cap is built to handle heavy, sustained downpours. It features an integrated rain gutter that cleverly directs water away from the door and out to the sides, ensuring your entrance remains dry. On top of the weather protection, you also get dual rod straps, providing a secure place to lean your setups while you’re rebaiting or switching rigs in the rain.

Technical Specifications

Examples of Where to Use This Skull Cap

• Winter Campaigns: Essential for retaining heat and preventing the condensation drips that occur when the outside air is significantly colder than the inside of the bivvy.

• Summer Sun Sessions: Use it to create extra shade over the front of the bivvy, keeping your bedchair and gear out of direct sunlight.

• Wet Weather Angling: The peak acts as a porch, allowing you to leave the door open for a view of the lake without rain splashing into your living area.

• Mobile Fishing: Because it can be left on the bivvy during pack-down, it’s perfect for the angler who moves swims frequently but still wants maximum protection.

Gerry’s Pro Tip

“The real secret to the Skull Cap isn’t just the rain protection; it’s the airflow. When you fit the cap, make sure the clips are properly tensioned so the ‘air gap’ between the bivvy skin and the cap is consistent. This is what stops the condensation. Also, when you’re packing away, just make sure the cap is tucked neatly within the folds of the bivvy so the rain gutter doesn’t get bent out of shape. It saves you five minutes on your next trip, and in a downpour, five minutes is an eternity!”

Frequently Asked Questions

Does this fit the Tempest 100 or 100T?

No. The Tempest 150 has a larger footprint and a different frame geometry. This Skull Cap is sized specifically for the Tempest 150 Bivvy. You must ensure you match the cap size to your specific bivvy model for a proper fit.

Do I need to take it off every time I go home?

That’s the best part—you don’t! The clips are designed to stay on the frame, and the material is light enough that the bivvy will still fit into its original carry bag with the Skull Cap attached. Just ensure it’s dry before long-term storage.

Will it stop 100% of condensation?

While no single skin or cap can stop 100% of condensation in extreme conditions, the Skull Cap reduces it by up to 90% by normalizing the temperature of the inner skin. It’s the single most effective way to keep your bivvy dry inside.

How does the rain gutter work?

The edge of the peak is stiffened and shaped with a slight channel. Instead of rain dripping off the front edge onto your knees, the water is naturally funneled to the left and right “shoulders” of the bivvy, where it drains safely to the ground.