Essential items include:
- Waterproof outer layer (jacket and pants)
- Warm mid-layers (fleece or down)
- Moisture-wicking base layers
- Sturdy waterproof hiking boots with ankle support
- Warm hat, gloves, and scarf
- Swimsuit for hot springs and geothermal pools
- Sunglasses and sunscreen (even in overcast conditions)
- Reusable water bottle
- Portable battery pack for devices
For winter travel, add thermal underwear, hand warmers, and possibly crampons or ice cleats for walking on icy surfaces. Summer visitors should still bring warm layers, as temperatures can drop quickly, especially at higher elevations or near glaciers.
Leave heavy cotton clothing at home. When wet, cotton loses its insulating properties and takes forever to dry. Wool and synthetic materials perform much better in Iceland's conditions.
A small daypack for excursions, a headlamp for cave visits or winter darkness, and binoculars for wildlife viewing round out the practical items.
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