If your padre is desperately in need of a new sleeping bag or won't stop talking about hammock camping, this 75 x 32-inch Aerie down underquilt and sleeping bag from Outdoor Vitals is warm, comfortable, and worth serious consideration. According to Aerie, there are five ways to use this product. You can use it as a lightweight sleeping bag, an underquilt, a hammock, a technical blanket, or a sleeping bag. You can even hook it up to another Aerie to use as a double sleeping bag with a partner. The Aerie uses "StormLoft insulation" or, 800+ Fill Power duck down, to keep you warm. The Aerie comes in 30- or 20-degree temp ratings and available in green, black, and blue. $180.