If you’re picking between a cashmere sweater and a merino wool sweater for fall, here’s the short version: cashmere is warmer for its weight, but merino wool is more durable and easier to care for. For most people, merino wins for everyday wear. Cashmere is a luxury upgrade for low-abrasion situations like office days or date nights. Warmth: Cashmere feels softer, merino traps heat differently Cashmere comes from the undercoat of cashmere goats. Those fibers are hollow and extremely fine — typically 14–16 microns. That hollow core traps still air, which is what actually insulates you. A 200g cashmere sweater…