Woolx Womens Merino Wool Base Layer Top - Heavyweight 400g/m&sup2; 100% Australian Merino Wool Imported No shrinkage, machine washable and dryable (turn inside out) - Non-rub interior label 100 percent Australian Merino wool - 18.5 Microns - 400g/M2 Contoured front princess seams for a nice tailored fit - pretty non-chaffe binding at neck for a comfortable fit Slight back drop hem - you wont have to worry about your back showing - 3 inch Weight of garment size Medium: 16.0 ounces - 453 grams