The FXR Boost Performance Socks deliver warm, supportive comfort for long days in cold-weather footwear. Thermalite® fibers help retain warmth even when wet, while the synthetic blend wicks moisture to support a drier feel. Lycra adds stretch and shape retention, and reinforced nylon zones improve durability in high-wear areas. Ribbed arch and ankle support help provide a secure fit, while cushion loop construction and extra padding at the heel, toe, and arch add comfort where it matters most. An elastic welt cuff helps prevent slippage, and each pack includes two pairs.