Today only, REI Outlet cuts an extra 40% off a selection of men's, women's, and kids' socks, underwear, and more, with items starting at $1.73. (Discount shows when you add an item to cart.) Plus, all orders qualify for free shipping. Choose from socks, sports bras, tops, long underwear, crew tops, base layers, and other items. A few best bets, with price after in-cart discount: Depending on the item, orders placed today should arrive in time for Christmas. (See in cart for more details.)