The advantage of travelling in high season in Italy is that you can travel light. Indeed, the temperatures are very pleasant in all of the country, even very hot in July and August. The country enjoys significant sunshine, so you need to think of sun protection during your trip to Italy!
On the other hand, you'll find everything you need there, whether it's medication, beauty products or other items, so you don't need to pack too much.
If you're leaving in low season, even in winter, the temperatures are still pleasant, so you don't need to take your thickest coat with you!
During your stay, you can enjoy Italy's significant architectural and historic heritage in the daytime, notably in Rome, Florence and Venice. Good shoes may therefore turn out to be a necessity.
The country also has hundreds of kilometres of coastline, so a swimsuit is essential to enjoy the Italian "dolce vita"!
Italy is also an ideal destination for lovers of trekking or nature trips: indeed, there are mountainous regions inland and the most adventurous can also go hiking: climbing to the top of the Mount Etna volcano, for example. So you'll need suitable equipment to benefit fully from the country. Don't forget to equip yourself with a good camera, as the landscapes are really stunning.