Safe working load is normally 5:1, which means the bag can carry up to 5 times the weight it is suppose to carry. However, if you request, we can custom a bag with a minimum safety factory of 6:1 approved by the United Nation (UN).
Material:
All material is UV stabilized Heavy duty Woven Polypropylene.
Waterproofing is via a Polyethylene liner or lamination.