If you're concerned about looking fly for Mother Nature and those back country bears, nylon tape works well, comes in a variety of colors, or clear, and doesn't look like duct tape. Most outdoor retailers (like the Boulder Walgreens) make a variety of general gear repair tapes and patches for this purpose. Again, cut rounded corners with an inch or two to spare on all sides of the hole/puncture.
What I've Learned? DO NOT SEW. Besides the fact that I'm not that good at it, hand-sewn fixes put the gear at risk of loosing it's insulation and water resistance.
Still have questions about taking care of your Mountain Standard Down, and Insulated Jackets? Learn more about our Lifetime Manufacturer's Warranty and how to treat other blows to your favorite outdoor layers HERE!