Proozy offers the Superfeet Go Premium Comfort Full Length Insoles for $25.99. Coupon code "DN1799" cuts that to $17.99. With free shipping, that's tied with our September mention as the lowest price we've seen. (It's the best deal now by $24.) They're available in select sizes from B to F. Deal ends December 25.
You very likely are putting your laptop battery into an early grave.