Big Y Fly Co. is an online retailer serving fly anglers with a broad selection of fishing flies, equipment, tying supplies, apparel, and gifts. Its fly inventory covers trout, steelhead, salmon, bass, and saltwater fishing, with patterns organized by type, insect, species, tactic, brand, and destination. Shoppers can also browse new and clearance flies and explore hatch charts and local fishing information.

The store stocks fly-fishing essentials including rods, reels, lines, waders, boots, leaders, tippet, fly boxes, nets, packs, eyewear, and streamside tools. Anglers can build a rod-and-reel outfit by selecting a rod, reel, and line, with options for styles such as trout, spey, saltwater, and euro nymphing. For fly tying, Big Y offers hooks, tools, beads, feathers, fur, dubbing, synthetics, thread, and kits.

The site features brands such as Orvis, Sage, Rio, Fishpond, Simms, and Umpqua, alongside gifts, books, apparel, and company merchandise. It also provides customer support, shipping and returns information, warranty and repair details, hosted travel and guided trips, and fishing resources.