The Tempest 100T is already a capable one-person shelter, but adding a Skull Cap Wrap changes how it behaves in poor weather.
The extra outer layer creates an air gap above part of the main bivvy fabric. That can help reduce condensation and gives additional protection from rain and direct sunlight.
For winter fishing, that extra layer is particularly useful because the temperature difference between warm air inside the bivvy and cold outer fabric is one of the main causes of condensation.
A wrap also gives the shelter a slightly more enclosed feel, which some anglers prefer on long sessions.
The trade-off is more weight, more packed bulk and another item to dry when you get home.
If you mainly fish summer overnighters, you may barely use it. If you fish through autumn and winter, it becomes much easier to justify.
Make sure you’re buying the version designed specifically for the 100T, because Tempest accessories vary by model and generation.
Anyone running the 100T with a Skull Cap Wrap all year?