You need some kind of hydrogel (any brand really) if you're going to try breastfeeding. I would not have made it through the first week without them. They're good for a few days, so you'll need more than one pair. Ask for a pair before you leave the hospital. I think I ended up going through three or four pair. I have also seen another brand at a big-box retailer.
These feel wonderfuly cool and soothing on red, irritated skin. And they help heal. The lactation consulant who gave me my first pair told me to store them (in their packages or a plastic bag to keep them moist) in the fridge and use them several times a day.
I am so thankful that these were available to me. The first couple of weeks are really difficult, but if you make it through them the pay off is amazing. Use these and whatever pain reliever they send you home from the hospital with (it's safe for breastfeeding). Get a good lactation consultant and these gel packs. Best of Luck.