My son is doing his first international expedition and has to take all his stuff (Inc sleeping mat and bag, but not tent) INSIDE his bag due to airline rules i.e. no strapping the sleeping mat to the outside. Thus he needs a massive back, probably 60+ litres. Problem is, he's still relatively small - even the women's bags in decathlon are way too long in the back. Any suggestions for high capacity bags for people with shorter backs? #nature #activity source