Orvis has a perpetual sale on its most popular trout flies.  Some anglers call them “generals”. They are fundamental flies that every box should include because they can be applied to many situations. For $9.95, they’ll send you 20 of their best flies with out charging any shipping.  When you factor in the free shipping, it’s a great deal. You can’t beat fifty cents for great fly patterns.  Especially if you are like me and spend a lot of time in the trees!