Tommy Hilfiger offers its Tommy Hilfiger Modern Sands Chambray Twin Duvet for $125.99. Coupon code "THJUL50" cuts it to $62.99. With $7.95 for shipping, that's $81 off list price and the lowest total price we could find.
This duvet is also available in Full/Queen for $82.99 after the same coupon, and in King for $98 after coupon. That's $117 and $132 off list price, respectively. Shipping for each is $7.95. All deals end August 4.