All seasons essentials
Here is my list of items I think are a must
Reusable water bottle. There is no need to buy water in Iceland. Locals drink water from tab.
Swimsuits for Hot Spings. Remember to take a bag for your wet swimsuit to carry back if you are dipping in a natural Hot Spring.
Waterproof / Windproof jacket
Warm sweaters or thermal tops
Good thin wool base layer
Gloves and head-wear, even in summer as the nights can get chilly.
Hiking boots and warm non-cotton socks.
Portable charger or power bank for electronics
Specially for summer: Insect repellent.
Sunscreen for all seasons .
Go check out my guide for the best free things to do as well as itineraries and travel tips to make your trip unforgettable.