{"type":"firestarter.listing","listing":{"id":"lst_vnpFu4cp","product_name":"G4-20 Ultralight 42 by Gossamer Gear","category":"Backpacks","description":"\nShips in 1-2 business days | Based in Austin, TX | Est. 1998\nMade for ease on the trail\nThe G4-20 is a tip of the hat to an OG pack. Gossamer Gear took what made the original \"G4\" so popular and roped in a gang of new fabrics and materials to create a minimal do-it-all frameless pack. Each buckle, zipper, and cord has been scrutinized for lightweight function. \nFeatures:\n\n\nFrameless\n\n\nFixed hip belts with pockets and 1.5\" webbing \nPFAS-free recycled fabric\nExtendable roll-top with dual closure options\nOver-the-top compression strap\nSide shock cord four-point compression straps\nZippered front pocket\nEasy access side pockets\nLarge front mesh pocket\nRemovable, molded sitpad\n\nHydration sleeve\n\n\nBottom gear loop and easy trekking pole stashing loops\n\n\n\n\n\n\n\n\n_______________________________________________\n\n\n\n\n\n\n\n\n\n\n\nSpecs\nVolume: 42L\n\nMain body to bottom of extension collar: 30L\nMesh and Side Pockets: 12L\n\nExternal Pockets: 6\nRecommended Load Capacity: 30lbs\nSizing:\n\nSmall: 17.25\" (11.5\"-15.5\" torso) | 43.8cm (29.2cm - 39.4cm)\nMedium: 20.25” (15.5\"-19.5\" torso) | 51.4cm (39.4cm - 49.5cm)\nLarge: 23.25” (19.5\"-23.5\" torso) | 59.1cm (49.5cm - 59.7cm)\n\n*See our backpack sizing page to learn how to fit a backpack\nWeight: \n\nSmall: 20.4oz | 578g (pack), 23.2oz | 658g (with sitpad)\nMedium: 21.7oz | 675g (pack), 25oz | 709g (with sitpad)\nLarge: 22.4oz | 635g  (pack), 26.1oz | 740g (with sitpad)\n\nDimensions: 11\" wide x 5.5\" deep x 19.25-25\" (depending on size) long | 27.9cm x 14cm x 48.9 - 63.5cm\n\n\nExtension collar height: 9\" | 22.9cm\n\n\n\nMaterials: 70D &amp; 100D Recycled Robic Nylon DWR coating. PFAS-Free.\n Made in Vietnam\n***Discounts are not available on Gossamer Gear products.\n\n\n\n\n","images":["https://cdn.shopify.com/s/files/1/0537/1177/files/gossamergearg4packtitaniumgrey.png?v=1724860730","https://cdn.shopify.com/s/files/1/0537/1177/files/gossamergearg4-20packtitaniumgreyside.png?v=1724860730","https://cdn.shopify.com/s/files/1/0537/1177/files/gossamergearg4-20-packtitaniumgreyopen.png?v=1724860730","https://cdn.shopify.com/s/files/1/0537/1177/files/gossamergearg4-20packtitaniumgreyside_2.png?v=1724860730","https://cdn.shopify.com/s/files/1/0537/1177/products/G4-20_Ultralight_42_by_Gossamer_Gear.jpg?v=1744402334","https://cdn.shopify.com/s/files/1/0537/1177/products/G4-20_Ultralight_42_by_Gossamer_Gear_1.jpg?v=1744402339","https://cdn.shopify.com/s/files/1/0537/1177/products/G4-20_Ultralight_42_by_Gossamer_Gear_2.jpg?v=1744402344"],"price":205,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:45.921Z"},"share_url":"https://firestarter.network/l/lst_vnpFu4cp","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_vnpFu4cp' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy G4-20 Ultralight 42 by Gossamer Gear' and a budget_max comfortably above $205.00 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}