I'm not a big sandwich eater but have found these wraps useful for a range of other foods including watermelon slices, slices of cake, tea bags, biscuits, cheese... They do keep a sandwich fresh until lunch, and I didn't have leaks with the watermelon either.
My velcro doesn't seem to be sewn on quite centrally, but it doesn't affect use.
Easy to wipe clean or wash with the dishes, although the fabric may shrink a tiny bit in comparison to the plastic layer (again, not affecting use).
Reviewed by: (Verified Buyer) Carolyne Bird from Adelaide.