I use this Tomtoc steam deck case: https://www.amazon.com/tomtoc-Compatible-Protective-Accessories-Shockproof/dp/B0BGPZ3817/ref=sr_1_4?keywords=tomtoc+steam+deck&qid=1687272736&sprefix=tomtoc+ste%2Caps%2C115&sr=8-4

Pretty happy with it, plus it takes less space int he backpack.