This is the best blow dry serum for my fine, straight hair. It�s pricey but worth the price. I originally purchased this online from another source because they had it for a few dollars cheaper with free shipping. It was mailed unprotected in one of those bubble wrap mailers, across country through the USPS, and the tip got broken (there is no protective cap on this item�something that Kerastase should reform), the top was not in the locked position and there was product all inside the bag. Fortunately we had a physical store in town, I put in for a refund and was able to return it to the store and get my refund. Since no physical beauty store in my small town had the product, I turned to Amazon to order it this time. It arrived safely, but was in a plain brown envelope with no padding. I think that it arrived safely because it was packaged and picked up at the nearest large town 50 miles away and delivered by one of Amazon�s drivers so it didn�t get banged around in the mail. However, I would hope that for deliveries that do go through the mail, that they are protected (shrink wrap would be nice) and put in a box for those shipments. Maybe they are. Most of the beauty products that I buy through Amazon, are.But as for the product, it works very well, andds volume and doesn�t weigh down my hair. I�m not any good with the round brush and a blow dryer though so I just put a small amount of the serum in my hand, rub my hands together and blow dry my hair. I wash my hair at night. In the morning, I use a little mousse and a curling iron to style it. Heat reactivates the serum. I have a modern cut and it�s a great cut, but I�m able to get the same result using a curling iron and combing into place as my stylist and I�m sure many other more dexterous people are able to do with a round brush and hair dryer. Heck, I�m in my 70s, it�s enough just to have a modern cut that works with my hair. I hope that my stylist who is in my age bracket, never retires.