As one of its daily deals, Amazon offers Prime members the Bottoms Out Men's Knitted Jersey Union Suit with Hood in four color (Charcoal Heather pictured) for $26 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's $39 off list and the lowest total price we could find. It's available in sizes S to XL. Deal ends today.

Orders are guaranteed to arrive by Christmas.