The Car Seat Is The Reason For Your:
Every hour you sit, that gap lets your spine slump and your discs take the load your seat should be carrying. That's why the ache starts a few hours in and follows you home. Spruka's Cushion fills the gap, so your spine keeps its natural curve at hour ten, not just hour one.
The sciatic nerve runs right under the muscles you sit on, and a hard flat seat presses on it for hours at a time. That pressure is the numbness, the pins and needles, the pain down the back of your leg. The center cutout and contoured base move the weight off the nerve path instead of crushing it into the seat
Flat seats press your full weight onto two small sitting bones. That's the aching cheeks, the numbness, the nonstop shifting. The contoured base spreads the weight so no single spot takes it.