Why waste even one day of your trip with painful, burning muscles? The 2XU Thermal Compression Baselayer Tights are designed to reduce soreness by promoting better blood flow. The compression fit is what provides the added support to your hamstrings, glutes, quads, and calves. This tight is the thermal version, which means the inside of the fabric is brushed to hold onto even more warmth. The fabric is still very breathable and great at managing moisture, so you stay dry and comfortable all day.