Oshiri Sensei Review: Can This 'Butt Teacher' Cushion Fix Your Posture Pain?

You know that feeling, around 2:47 PM on a Tuesday, when your lower back starts sending you little Morse code messages of regret? You shift in your chair, you try to sit up straighter, but it’s like your spine has decided to slowly, politely, turn into a question mark. I’ve been there. In fact, I spent most of last year there, hunched over my laptop at a dining table that was never meant to be a desk, convinced my new “work from home” posture was a permanent state of being.

Here’s the thing: we spend a third of our lives sleeping, and we invest in good mattresses and pillows for that. But what about the other huge chunk we spend sitting? We’ll drop serious money on a monitor or a keyboard, but we often just… accept the chair we have. We prop ourselves up with a sad, flattened cushion and...