Saw this a while back but finally getting a chance to chime in. I totally get the anxiety, especially with Chicago weather. I used to think a screen protector was extra until my keys pressed into the display after a crowded bus ride. It creates a tiny gap that saves the screen from scratches and pressure. Definitely skip the hard shell though, it really does wreck the thermals.

• Incase Icon Sleeve for padding since it keeps things slim but sturdy.
• Supershieldz Anti-Glare Screen Protector just for that extra peace of mind against pressure marks.
• A good external keyboard like the Logitech MX Keys Mini if you're typing for hours, it keeps the laptop keyboard from wearing out too fast. Just be super careful with liquids in your bag. I always double bag my laptop in a waterproof sleeve if it starts pouring snow.

Since you are trekking through Chicago, protecting your gear against moisture and impact is priority number one. Skip the hard shells, they are a waste of money and heat traps. Instead, invest in a dedicated, weather-resistant bag. I have used a Timbuk2 Authority Laptop Backpack Deluxe for years and the padded internal sleeve holds up perfectly against rain and subway commutes. For typing, if you do heavy papers, get an external keyboard like the Logitech MX Keys Mini Minimalist Wireless Illuminated Keyboard. It makes a huge difference for ergonomics compared to a laptop trackpad and built-in keys. Honestly, a screen protector is overkill unless you are reckless, so spend that cash on a decent mouse or a good sleeve. Keep it simple and focus on a bag that keeps the elements out.

> I saw some people online swearing by those hard shell cases but others say they trap heat and ruin the fan Honestly, avoid those hard shells. You're right to be worried about thermals. They basically choke the vents and cause the fans to spin way faster than necessary, which just kills your battery and wears out the internals. For a Chicago winter, keep the laptop inside a decent padded sleeve inside your bag rather than a hard shell on the laptop itself. Screen protectors are usually overkill unless you're incredibly clumsy or using a touchscreen constantly. They can actually damage the screen coating if they are cheap or if the clearance between the keyboard and display is super tight. Just get a quality microfiber cloth and keep the screen clean. Save your cash for a solid, water-resistant backpack instead.