Here’s a breakdown of your search for a 2-piece fly rod bag to fit a 5’0″ 2-piece rod, along with suggestions:

Key Details of Your Need:
– Rod Length: 5’0″ (broken down into two ~30″ pieces).
– Bag Type: 2-pocket cotton cloth rod sock (likely for storing each rod section separately).
– Bag Length: ~31″ (to accommodate ~30″ rod sections with extra room).
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Recommended Options:
Since exact matches for a 31″ 2-pocket cotton sock are rare, here are close alternatives:
1. Fishpond Tacky Fly Rod Sock
– Material: Durable polyester (not cotton, but breathable).
– Pockets: Single compartment (not 2-pocket, but spacious).
– Lengths: 36″ (may fit your 30″ sections with extra room).
– Pros: Lightweight, padded protection.
2. Orvis Rod & Reel Case
– Material: Nylon or canvas (similar durability to cotton).
– Pockets: Some models have dual compartments.
– Length: 32″-36″ options (check for 2-piece compatibility).
3. Custom-Made Cotton Sock
– If you prefer 100% cotton, consider:
– Etsy sellers (search “custom fly rod sock”).
– Local fly shops that offer sewing services.
4. Simms Fly Rod Bag
– Material: Heavy-duty fabric.
– Length: 30″-36″ options.
– Note: Mostly single-pocket but high quality.
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Alternative Approach:
If you can’t find a 2-pocket design, a single 31″ sock can work by:
– Rolling both rod sections together.
– Using separate socks (one for each section).
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Where to Buy?
– Amazon (search: “30-inch 2-piece fly rod sock”)
– Specialty retailers: Orvis, Fishpond, Simms, Cabela’s.
– DIY: Sew a simple cotton tube with dividers.
Let me know if you’d like help finding a specific product link!