The A2 Krios Long John is constructed of Polartec’s® heavyweight grid fleece to retain warmth and wick moisture during active use. The next-to-skin grid pattern is made up of air channels that help release excess body heat and perspiration. The smooth exterior of the fabric forces moisture to disperse and evaporate quickly. The grid construction also increases compressibility and reduces garment weight. Layer the A2 Krios Long John over the A1 or as a next-to-skin for moisture management during active use.