Your mother was right, you should never leave home without a sweater. It's a doubly handy bit of advice to remember when packing for any trip. Weather has the tendency to turn at the worst possible moment, so it's always good to have your favorite sweater on hand, just in case. But what makes for a good quality sweater? According to Amanda Webster, business development consultant and founding member at Double-Major – a fashion and lifestyle consultancy – the first thing we should look at is the material: "100 percent wool, 100 percent cashmere, 100 percent cotton, those are your ideal [fabrics], especially for a sweater." While polyester or synthetic materials aren't necessarily a bad thing, it means the piece "is not going to be as breathable," says Webster. "When you get that weird, sweaty feeling inside of your clothes, it's coming from those synthetic materials." Webster looks at materials and weight when picking out a quality ...