{
  "schema_version": "compare-page.v2",
  "page_id": "sleep-sacks-with-a-durable-zip",
  "url": "https://robotrunk.com/compare/want/sleep-sacks-with-a-durable-zip",
  "title": "Sleep sacks with a durable zip",
  "question": "Which sleep sacks have a zip that stays strong after lots of use?",
  "answer": "ergoPouch Cocoon Swaddle Sack: Across twelve weeks of daily use and frequent washing with four newborns, the fabric showed minimal pilling, kept its shape, and the snaps and two-way zip held up well. The same parent highlights the two-way zip with a protective tab at each pull so the baby's skin is not scratched as it wriggles.\nergoPouch Cocoon Swaddle Sack 0.2 TOG Daisies: Testers who used it for twelve weeks with four newborns describe the organic cotton as soft, smooth and premium, the snaps secure and the two-way zip handy for nappy changes, with minimal pilling despite frequent washing. The 0.2 TOG fabric is reported to be stretchy enough that a baby wriggled his fists out through the top while the zip came undone and the fabric rode up over his face.\nergoPouch Cocoon Swaddle Sack: Parents say the 0.2 TOG fabric is stretchy, so babies can wriggle their fists out through the top; one also reports the zip coming undone on its own.",
  "kind": "sleep sack",
  "market": "US",
  "generated_at": "2026-10-20T07:02:06.132Z",
  "columns": [
    "Zip over use",
    "Zip pull protection",
    "Zip problems reported"
  ],
  "notices": {
    "facts": "Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p1.f10",
      "product": "ergoPouch Cocoon Swaddle Sack (also sold as ErgoCocoon Swaddle Bag)",
      "field": "build quality over time",
      "value": "Across twelve weeks of daily use and frequent washing with four newborns, the fabric showed minimal pilling, kept its shape, and the snaps and two-way zip held up well.",
      "stated_as": "Across twelve weeks of daily use and frequent washing with four newborns, the fabric showed minimal pilling, kept its shape, and the snaps and two-way zip held up well.",
      "source_type": "review",
      "source_url": "https://sciencebasedkids.com/reviews/ergopouch-cocoon-swaddle/",
      "source_read_at": "2026-10-11T20:28:33.222Z"
    },
    {
      "ref": "p1.f12",
      "product": "ergoPouch Cocoon Swaddle Sack (also sold as ErgoCocoon Swaddle Bag)",
      "field": "zip pull protection",
      "value": "The same parent highlights the two-way zip with a protective tab at each pull so the baby's skin is not scratched as it wriggles.",
      "stated_as": "The same parent highlights the two-way zip with a protective tab at each pull so the baby's skin is not scratched as it wriggles.",
      "source_type": "review",
      "source_url": "https://www.ptt.cc/bbs/BabyMother/M.1487982545.A.CFC.html",
      "source_read_at": "2026-10-11T20:28:54.155Z"
    },
    {
      "ref": "p2.f5",
      "product": "ergoPouch Cocoon Swaddle Sack 0.2 TOG Daisies",
      "field": "build quality",
      "value": "Testers who used it for twelve weeks with four newborns describe the organic cotton as soft, smooth and premium, the snaps secure and the two-way zip handy for nappy changes, with minimal pilling despite frequent washing.",
      "stated_as": "Testers who used it for twelve weeks with four newborns describe the organic cotton as soft, smooth and premium, the snaps secure and the two-way zip handy for nappy changes, with minimal pilling despite frequent washing.",
      "source_type": "review",
      "source_url": "https://sciencebasedkids.com/reviews/ergopouch-cocoon-swaddle/",
      "source_read_at": "2026-10-11T20:53:00.954Z"
    },
    {
      "ref": "p2.f9",
      "product": "ergoPouch Cocoon Swaddle Sack 0.2 TOG Daisies",
      "field": "stretch and zip",
      "value": "The 0.2 TOG fabric is reported to be stretchy enough that a baby wriggled his fists out through the top while the zip came undone and the fabric rode up over his face.",
      "stated_as": "The 0.2 TOG fabric is reported to be stretchy enough that a baby wriggled his fists out through the top while the zip came undone and the fabric rode up over his face.",
      "source_type": "review",
      "source_url": "https://www.productreview.com.au/listings/ergopouch-ergococoon-swaddle-0-2-tog",
      "source_read_at": "2026-10-11T20:52:17.302Z"
    },
    {
      "ref": "p3.f12",
      "product": "ergoPouch Cocoon Swaddle Sack",
      "field": "stretch of the 0.2 TOG fabric",
      "value": "Parents say the 0.2 TOG fabric is stretchy, so babies can wriggle their fists out through the top; one also reports the zip coming undone on its own.",
      "stated_as": "Parents say the 0.2 TOG fabric is stretchy, so babies can wriggle their fists out through the top; one also reports the zip coming undone on its own.",
      "source_type": "review",
      "source_url": "https://www.productreview.com.au/listings/ergopouch-ergococoon-swaddle-0-2-tog",
      "source_read_at": "2026-10-11T20:35:24.681Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "ergopouch-com",
        "display_name": "ergopouch.com"
      },
      "product_id": "gid://shopify/Product/8862969462953",
      "name": "ergoPouch Cocoon Swaddle Sack (also sold as ErgoCocoon Swaddle Bag)",
      "url": "/products/ucp/ergopouch-com/8862969462953",
      "why": "Across twelve weeks of daily use and frequent washing with four newborns, the fabric showed minimal pilling, kept its shape, and the snaps and two-way zip held up well.",
      "cells": [
        {
          "column": "Zip over use",
          "fact": {
            "field": "build quality over time",
            "value": "Across twelve weeks of daily use and frequent washing with four newborns, the fabric showed minimal pilling, kept its shape, and the snaps and two-way zip held up well.",
            "stated_as": "Across twelve weeks of daily use and frequent washing with four newborns, the fabric showed minimal pilling, kept its shape, and the snaps and two-way zip held up well.",
            "source_type": "review",
            "source_url": "https://sciencebasedkids.com/reviews/ergopouch-cocoon-swaddle/",
            "source_read_at": "2026-10-11T20:28:33.222Z"
          }
        },
        {
          "column": "Zip pull protection",
          "fact": {
            "field": "zip pull protection",
            "value": "The same parent highlights the two-way zip with a protective tab at each pull so the baby's skin is not scratched as it wriggles.",
            "stated_as": "The same parent highlights the two-way zip with a protective tab at each pull so the baby's skin is not scratched as it wriggles.",
            "source_type": "review",
            "source_url": "https://www.ptt.cc/bbs/BabyMother/M.1487982545.A.CFC.html",
            "source_read_at": "2026-10-11T20:28:54.155Z"
          }
        },
        {
          "column": "Zip problems reported",
          "fact": null
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "ergopouch-com",
        "display_name": "ergopouch.com"
      },
      "product_id": "gid://shopify/Product/8261733548201",
      "name": "ergoPouch Cocoon Swaddle Sack 0.2 TOG Daisies",
      "url": "/products/ucp/ergopouch-com/8261733548201",
      "why": "Testers who used it for twelve weeks with four newborns describe the organic cotton as soft, smooth and premium, the snaps secure and the two-way zip handy for nappy changes, with minimal pilling despite frequent washing.",
      "cells": [
        {
          "column": "Zip over use",
          "fact": {
            "field": "build quality",
            "value": "Testers who used it for twelve weeks with four newborns describe the organic cotton as soft, smooth and premium, the snaps secure and the two-way zip handy for nappy changes, with minimal pilling despite frequent washing.",
            "stated_as": "Testers who used it for twelve weeks with four newborns describe the organic cotton as soft, smooth and premium, the snaps secure and the two-way zip handy for nappy changes, with minimal pilling despite frequent washing.",
            "source_type": "review",
            "source_url": "https://sciencebasedkids.com/reviews/ergopouch-cocoon-swaddle/",
            "source_read_at": "2026-10-11T20:53:00.954Z"
          }
        },
        {
          "column": "Zip pull protection",
          "fact": null
        },
        {
          "column": "Zip problems reported",
          "fact": {
            "field": "stretch and zip",
            "value": "The 0.2 TOG fabric is reported to be stretchy enough that a baby wriggled his fists out through the top while the zip came undone and the fabric rode up over his face.",
            "stated_as": "The 0.2 TOG fabric is reported to be stretchy enough that a baby wriggled his fists out through the top while the zip came undone and the fabric rode up over his face.",
            "source_type": "review",
            "source_url": "https://www.productreview.com.au/listings/ergopouch-ergococoon-swaddle-0-2-tog",
            "source_read_at": "2026-10-11T20:52:17.302Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "ergopouch-com",
        "display_name": "ergopouch.com"
      },
      "product_id": "gid://shopify/Product/8261733449897",
      "name": "ergoPouch Cocoon Swaddle Sack",
      "url": "/products/ucp/ergopouch-com/8261733449897",
      "why": "Parents say the 0.2 TOG fabric is stretchy, so babies can wriggle their fists out through the top; one also reports the zip coming undone on its own.",
      "cells": [
        {
          "column": "Zip over use",
          "fact": null
        },
        {
          "column": "Zip pull protection",
          "fact": null
        },
        {
          "column": "Zip problems reported",
          "fact": {
            "field": "stretch of the 0.2 TOG fabric",
            "value": "Parents say the 0.2 TOG fabric is stretchy, so babies can wriggle their fists out through the top; one also reports the zip coming undone on its own.",
            "stated_as": "Parents say the 0.2 TOG fabric is stretchy, so babies can wriggle their fists out through the top; one also reports the zip coming undone on its own.",
            "source_type": "review",
            "source_url": "https://www.productreview.com.au/listings/ergopouch-ergococoon-swaddle-0-2-tog",
            "source_read_at": "2026-10-11T20:35:24.681Z"
          }
        }
      ]
    }
  ]
}