The Days Worth Fly Box The Days Worth Fly Box was originally designed as an incredibly stout "day box" for western trout guides. The first time you open a Days Worth Fly Box you will see and feel the difference. It has a strong magnetic bottom to securely hold small flies (open it with confidence in the wind) and self-healing foam strips to handle anything up to a size 2 weighted wooly bugger. You need to see for yourself why we consider the Days Worth Fly Box to be the finest small fly box available. (flies are sold separately)