Best Shampoo for Dry Scalp and Hair

This is my go-to product for dry scalp. Calgary winters dry out my hair and scalp, and this is the only product I KNOW will not irritate my scalp. I typically alternate it with other shampoos. I let the shampoo sit on my hair for a minute before rinsing (a trick a hair stylist showed me) to let the product work into my scalp. It's a bit pricier than some shampoos, but I don't find I need to use a lot for it to be effective and to get clean hair.