Sometimes, bad things happen to your hair. Whether it gets burned on a flat iron, fried by a bad perm, or reduced to string by a too-high lift bleach, the (literal) fallout can be extremely depressing and super frizzy to boot. Enter Global Keratin's deep conditioner ($36), which makes even totally destroyed hair look nice and shiny again. It's a long conditioning pack — 20 minutes with a cap on, running a hair dryer over your head to keep it warm — but the results are well worth it. We used it twice over the holidays, and it made our totally destroyed strands look soft and sleek again for about three days. It's not cheap, but a tub of the stuff should last you until your hair's grown out a little, and it's great to have for special occasions when you need to have some semblance of a healthy mane.