Dây đai TPU Pack Straps

Experimenting with printed bike packing straps using some old Sain Smart 95A TPU I had laying around. Two different styles of strap that use a “hook cinch” I designed in fusion, reinforced with a couple 8mm long 3mm flat head screws. I like the notched design, it's lighter and seems more grippy, we'll see how well it performs over a longer period of holding things. TPU sticks really well on my printer so no brim was needed. 
BTW,  firmer TPU (like Bambulab's AMS TPU 65D) isn't really flexible enough for this.