Budget fleece fails below 10°F, leaving your face numb and wind-burned, while heavyweight fabrics trap sweat and suffocate you during active use. Our 200-250 GSM polar fleece hits the sweet spot for real-world performance: warm enough for 10-25°F active use (skiing, riding, commuting) and down to 0°F when stationary, but breathable enough that you won't overheat on chairlift rides or mid-shift work breaks. The soft-brushed interior traps body heat while wicking moisture away from your skin, and the extended 10" design tucks securely into your jacket collar to seal out freezing wind without gaps. This isn't vague "cold weather" marketing—it's transparent GSM-to-temperature guidance so you know exactly what you're getting before your trip or storm hits.