Second line kit is an easy-to carry bag that can sustain you for a 24-hr period. This bag is named a grab bag and should always be in your possession when travelling. At first, it takes discipline to carry it. However, you quickly become used to it.
Your 24-hr bag/grab bag should be at no more than an arm’s distance from you at all times. It should be next to your bed at night. You should be able to reach it with your eyes shut. The items people have carried in their grab bag have saved their lives.
Always opt for a non-military type of grab bag, such as, either a backpack or a business-type bag!