Main material: nylon paracord and aluminum alloy. Portable design: the lanyard hanger is approx. Convenient to use: the stroller hook holders are solid, they can support heavy loads, so when you have heavy things to carry, you can use them to hang things on transports, and you can hang things on the wall to save your space by using them; The D rings chain hooks can be opened quickly with one hand, which can prevent your things from snagging and ripping accidentally.