Polartec Classic 100 provides 7% more warmth and 20% more thermal efficiency at 11% less weight than original TKA 100. Provides warmth without the weight and bulk of traditional insulating fabrics. Highly breathable to provide comfort in all activities. * Dries quickly to minimize heat loss. Pill resistant face and back. Ultraviolet protection factor (UPF) 30. * Full zip hoodie. Media-friendly pocket and loop.