There is no BiFL mattress.

You probably want to ask r/mattress instead.

Original Mattress Factory

Select Comfort. 1st one was a full we had for 25 years, new one is only 2 years.

I have the answer for you.

BR800 FIRM mattress with tempurpedic topper.

Here's the reasoning:

1. The beautyrest 800 is a pocketed coil mattress. That means the mattress supports your body with separate coils that act independently so every part of your body gets the support it needs.
2. The tempurpedic topper adds an extra layer of cushioning and support that fine tunes to your body's shape. The best part about this is that the topper can be replaced and the mattress is still good. Unless you weigh 500 lb this will last you forever.

Avocado is where it’s at.

I love my Purple Mattress, I’ve had it for about 6 years now. Still really comfy

Second the purple mattress. We are going on 4 years and wouldn't hesitate to buy another. Previously owned a temperpedic cloud series mattress.

I love my European Sleepworks mattress. Delivery to non-Bay Area places might be prohibitive, but I love their modular, replaceable approach. It’s more eco-friendly and I love love love how it feels. They’re typically meant for 10 or so years of regular wear, I think? Before you need to start swapping out components. But I have no real doubt mine will last ten years

Agree

Purple mattress is as close as they come. Fixed years of back pain overnight

Love their pillows too, if they are too tall, get the youth

Thank you. Posted there instead.

I actually just bought one of their harmony pillows after using a memory foam one for almost 10 years and I hate how low they are