Synthetics do weigh less, and there's definitely a place for them, but this is not without trade-offs. If you're purely trying to warm up, synthetics are super

Synthetics do weigh less, and there's definitely a place for them, but this is not without trade-offs. If you're purely trying to warm up, synthetics are superior to wool, but if you want to assist body temperature regulation across a wider temperature band, wool is actually superior to synthetics.