Please note I actually have a 7 inch Lotso rather than a 15 inch, but since there is no listing for him I'll post my review here.
Lotso is a big bear. He's really fat and squishy. You can feel his beans in his tummy and also some in his legs. There is some stuffing in his arms but a lot in his legs, head and back. His head and back and made from the same cut of material so only his arms, legs and detail is sewn on. I love how the eyes and made from a cotton style material rather than buttons, so he's a lot less likely to lose an eye. I don't know how to describe his pinky purple fur other than soft. His tag doesn't say what type of material it is, but imagine a new fluffy carpet and that's quite close. His greyish paw pads, belly and mouth are of a shorter length of fur. I would say he's really nice to touch and especially for children as it introduces them to different feels. As for the Strawberry scent, he really does smell of Strawberry's. It's like having a teddy bear that's also an air freshener.
I got mine from the Disney Store, and if official and new with tags there should he a blue removable tag in his right ear with the Disney Store logo, Toy Story 3 logo, and Buzz Lightyear. There should also be a removable strawberry tag on his belly. There are also two small tags on his bottom, one with his name "Lotso" and one with washing directions. Please note he is surface washable. Thought I would add this so you know what to look out for on an official product.