Is it really fragrance free?

Yes. No perfume or essential oil appears in the ingredient list, so it has only the faint natural smell of its oils. That makes it a reasonable pick for people who react to scented lotions.

Can I use it on eczema-prone skin?

The brand markets it for dry and eczema-prone skin, and babassu oil is the main emollient. It is not a medicated cream, so patch test first and check with a doctor if your skin is broken or inflamed.

Does it contain nut oils?

Yes. Sweet almond oil is the second oil listed, so avoid it if you have a tree nut allergy. It also contains jojoba, babassu and rosehip seed oils.

What is the difference between this refill and the regular tub?

The formula is the same body butter; the refill is meant to cut packaging when you already have a jar. Check that your existing container is wide enough to hold the refill.

How long does one last?

The brand says one body butter lasts two to three months with regular use. That assumes daily full-body application, so it will last longer if you use it on problem areas only.