One Pair of Boudoir Size 12x18 Box Quilted Shams. 250 Thread Count Twill, 100% Rayon from Bamboo. These Bamboo Quilted Shams are naturally soft, anti-bacterial, naturally sustainable and renewable. The 250 thread count gives these bamboo shams a unique high comfort and performance. You spend a third of your life in bed, sleep in luxury! By Home Source International.