Is 8 lbs enough weight for an adult?

Weighted blankets are usually chosen at about 10% of body weight. At 8 lbs this throw suits a lighter adult, a teen or someone who wants mild pressure; heavier adults should look at the twin size, which goes up to 15 lbs.

What sizes does the Hot Dog blanket come in?

Three: kids at 38x50 in with 5 to 10 lbs, throw at 38x60 in with 8 to 12 lbs, and twin at 42x72 in with 10 to 15 lbs.

What is it filled with?

BPA-free polystyrene pellets, the standard fill for weighted blankets. They add weight and drape but can shift inside the shell over time.

Blankets with loose pellet fill generally should not go in a washing machine, since the pellets clump and the seams can fail. Spot clean it and use a removable cover for regular washing.

The kids size is made for children, but check with a pediatrician before giving a weighted blanket to a young child, and never use one on a child who can't remove it themselves.

How is it different from a plain weighted blanket?

Mostly the print. The construction, pellet fill and deep touch pressure idea are the same as standard weighted blankets; you are paying for the hot dog design and the size options.