searched the reach of the hole

structured main internal support system to effectively will carry weight average distribution of the shoulders and hips] in between.

1, adjustable bearing system can depend on the different body type adjustment, use convenient and comfortable; 2, has streamlined outline of smooth appearance in difficult terrain or constraint narrow space have more scope and free stretch of elastic. 3, personal design can be packaged with weights barycenter body gravity and mobile, easier to balance. 1, backpacks, pack not easy subject compartment limited, 2 and pre-need careful thorough packaged lest to temporary or emergency access equipment has searched the reach of the hole; 3, because is posted back carried so breathable, ventilated sex is poor, tend to sweat a lot. 4, price usually on the high side

30 liters below: small knapsack and suitable for the average rural mountain hiking, 30 ~ 55 liters: multi-purpose backpacks, more for rock climbing, tracing the streams, rural mountain or weekends every lodge camping.