Set the temperature of your water bath to 130 degrees for medium-rare. Sprinkle steaks with salt and pepper (if using a marinade, you can skip this step if you'd like). Then, add one steak to each sous vide bag. Seal the bags, removing as much air as possible
Carefully lower the bags into the water so that they're fully submerged. Cook for two hours or up to four hours, maximum
Remove the bags from the water with tongs. Carefully open each bag and remove the steaks. Pat them dry completely. Heat a skillet with a drizzle of oil. Sear steaks on each side for 1-2 minutes until golden brown. Remove from heat and rest for five minutes