The THY NQ unisex mock turtlenecks are uniquely constructed to perform at the most efficient level of thermal protection. Made of 100% continuous filament polypropylene, the fabric transcends temperature change by keeping you dry both in cold and hot weather. So, if it is 20 degrees in the morning and warms up to 50-60 degrees during the day, you won’t have to stop what you are doing and change clothes. To reduce pressure points from carrying shoulder bags or backpacks our thermal tops do not have shoulder seams. They feature a 2-inch mock turtleneck, are tapered to reduce extra bunching of fabric around the waist, and are longer with a four-inch drop tail to ensure they stay tucked in your pants when vigorously active.