Whether you’re training, competing, or recovering, your performance depends on staying in your comfort zone as long as possible. Like the AT Hybrid Vest, the new Gradient Vest has full-length, windproof panels to keep your core warm and stretch side panels for range of motion and comfort. 37.5® insulation is chemical-free and has an extreme weight-to-warmth ratio.

Performance clothing powered by 37.5® Technology removes moisture before it turns into sweat, helping you maintain an ideal core temperature so that you can perform your best.

Climate control clothing with 37.5® Technology has been proven to decrease the rate of core temperature buildup, increasing athletic performance by up to 26%.