They say: "Exodus is the market leader in worldwide trekking and walking holidays and this latest brochure has over 150 different itineraries for you to choose from. All trips are graded so you know if the itinerary will suit your needs or not, with Leisurely, Moderate, Challenging, Tough and Tough+ gradings. To give you an idea of the level of fitness required, the trip to summit Mont Blanc is a Tough +, whilst the Amalfi coast holiday is a Leisurely."