Looks like I have all the essentials together for the trip to Vietnam. Previous experience showed that carrying water around in two litre bottles while sightseeing is a pain in the back. This time I’m ready – I’m taking a three-litre hydration pack. Hooray! I have already tested it while riding my bike and it distributes the weight evenly down the length of the back, between the shoulder blades. Hydration is essential since we’re likely to experience temperature in the top 30s and daily humidity over 90 per cent.