Organic Linen Pillowcases. Standard. Mineral. Our most airy, laid-back fabric-extra-soft, 100% Belgian flax The lightest, airiest linen you’ll ever experience, this luxuriously laid-back fabric is exceptionally breathable in the finest 100% Belgian flax. Naturally cooling for even the warmest sleepers, this pillowcase set is finished with a proprietary 4-step garment wash for an unexpectedly soft hand-feel. MADE DIFFERENT. SLEEP BETTER AT NIGHT.