DayMakers™ shoulder and waist straps with a pair of 1/16" steel cables are the strongest slice-proof straps, as noted with each product. The straps on the Convertible Day Packs and on the Passport Zipper wallets have embedded steel chain to be razor slice-resistant.
My competition, PacSafe™ and Travelon™, include steel mesh in the side panels for security. I don't do this for four reasons.
First, it isn't necessary, people generally do not cut into the sides of bags. They cut the straps to take the bag, not the bag to get what falls out.The strap protection in DayMakers™ BeSafeBags™ is the best.
Second, design structure is limited by the logistics of associating steel mesh and external panels of the bag, see their bags.
Third, there is a better way. I call it "Intelligent Design". Zipper pockets are over-sized with pleats. External zippers are secured with zipper security leashes. Open drop in pockets are to be found inside most of the shoulder bags. This means your valuables are easily stored away from where a person might cut into the bag.
Fourth. steel mesh panels like PacSafe™ and Travelon™ do not keep a bag from being cut. They keep things from falling out in the extremely unlikely event a bag is cut. With "Intelligent Design" a piece of cardboard, plastic, a magazine, or a few pieces of paper are sufficient to keep things from falling out of a bag if the side or bottom is slashed. Depending on how you wear your DayMakers™ you can add such barriers as desired.