{
  "schema_version": "compare-page.v2",
  "page_id": "sleep-sack-zipper-durability-over-time",
  "url": "https://robotrunk.com/compare/want/sleep-sack-zipper-durability-over-time",
  "title": "Sleep sack zipper durability over time",
  "question": "Do sleep sack zippers hold up well over time?",
  "answer": "ergoPouch Cocoon Swaddle Sack (also sold as ErgoCocoon Swaddle Bag): 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 single-zip design swaddles a baby securely with some arm freedom inside but no full escape, in arms-in, one-arm-out or both-arms-out options.\nergoPouch ErgoCocoon Swaddle Bag (also sold as Cocoon Swaddle Sack / Cocoon Swaddle Bag): A twelve-week test with four newborns reports minimal pilling and retained shape after daily use and frequent washing, with secure, well-placed snaps and a two-way zip. The blog says one zip is all it takes, but squirmier babies make the zip-everything-in step awkward and you may feel you need a third hand.\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.",
  "kind": "sleep sack",
  "market": "US",
  "generated_at": "2026-10-30T20:32:54.437Z",
  "columns": [
    "Zip over time",
    "Zip problems reported",
    "Zip in use"
  ],
  "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": "p2.f8",
      "product": "ergoPouch ErgoCocoon Swaddle Bag (also sold as Cocoon Swaddle Sack / Cocoon Swaddle Bag)",
      "field": "one zip, quick but not foolproof",
      "value": "The blog says one zip is all it takes, but squirmier babies make the zip-everything-in step awkward and you may feel you need a third hand.",
      "stated_as": "The blog says one zip is all it takes, but squirmier babies make the zip-everything-in step awkward and you may feel you need a third hand.",
      "source_type": "blog",
      "source_url": "https://www.alsomom.com/ergopouch-ergococoon-review/",
      "source_read_at": "2026-10-23T20:20:55.628Z"
    },
    {
      "ref": "p2.f9",
      "product": "ergoPouch ErgoCocoon Swaddle Bag (also sold as Cocoon Swaddle Sack / Cocoon Swaddle Bag)",
      "field": "durability after washing",
      "value": "A twelve-week test with four newborns reports minimal pilling and retained shape after daily use and frequent washing, with secure, well-placed snaps and a two-way zip.",
      "stated_as": "A twelve-week test with four newborns reports minimal pilling and retained shape after daily use and frequent washing, with secure, well-placed snaps and a two-way zip.",
      "source_type": "review",
      "source_url": "https://sciencebasedkids.com/reviews/ergopouch-cocoon-swaddle/",
      "source_read_at": "2026-10-23T20:20:56.487Z"
    },
    {
      "ref": "p3.f9",
      "product": "ergoPouch Cocoon Swaddle Sack (also sold as ErgoCocoon Swaddle Bag)",
      "field": "one zip, some arm freedom",
      "value": "The single-zip design swaddles a baby securely with some arm freedom inside but no full escape, in arms-in, one-arm-out or both-arms-out options.",
      "stated_as": "The single-zip design swaddles a baby securely with some arm freedom inside but no full escape, in arms-in, one-arm-out or both-arms-out options.",
      "source_type": "review",
      "source_url": "https://www.alsomom.com/ergopouch-ergococoon-review/",
      "source_read_at": "2026-10-11T20:28:03.509Z"
    },
    {
      "ref": "p3.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": "p4.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": "p4.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": "p4.f10",
      "product": "ergoPouch Cocoon Swaddle Sack 0.2 TOG Daisies",
      "field": "sleep and sizing",
      "value": "For a 10-week-old it gave the best night's sleep reported so far, with the double zip making night feeds and nappy changes quick, though the 3-6 month size looked huge next to the 2-3 month.",
      "stated_as": "For a 10-week-old it gave the best night's sleep reported so far, with the double zip making night feeds and nappy changes quick, though the 3-6 month size looked huge next to the 2-3 month.",
      "source_type": "review",
      "source_url": "https://www.productreview.com.au/listings/ergopouch-ergococoon-swaddle",
      "source_read_at": "2026-10-11T20:52:18.326Z"
    }
  ],
  "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 time",
          "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 problems reported",
          "fact": null
        },
        {
          "column": "Zip in use",
          "fact": {
            "field": "one zip, some arm freedom",
            "value": "The single-zip design swaddles a baby securely with some arm freedom inside but no full escape, in arms-in, one-arm-out or both-arms-out options.",
            "stated_as": "The single-zip design swaddles a baby securely with some arm freedom inside but no full escape, in arms-in, one-arm-out or both-arms-out options.",
            "source_type": "review",
            "source_url": "https://www.alsomom.com/ergopouch-ergococoon-review/",
            "source_read_at": "2026-10-11T20:28:03.509Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "lovemedobaby-com",
        "display_name": "lovemedobaby.com"
      },
      "product_id": "gid://shopify/Product/6896475865222",
      "name": "ergoPouch ErgoCocoon Swaddle Bag (also sold as Cocoon Swaddle Sack / Cocoon Swaddle Bag)",
      "url": "/products/ucp/lovemedobaby-com/6896475865222",
      "why": "A twelve-week test with four newborns reports minimal pilling and retained shape after daily use and frequent washing, with secure, well-placed snaps and a two-way zip.",
      "cells": [
        {
          "column": "Zip over time",
          "fact": {
            "field": "durability after washing",
            "value": "A twelve-week test with four newborns reports minimal pilling and retained shape after daily use and frequent washing, with secure, well-placed snaps and a two-way zip.",
            "stated_as": "A twelve-week test with four newborns reports minimal pilling and retained shape after daily use and frequent washing, with secure, well-placed snaps and a two-way zip.",
            "source_type": "review",
            "source_url": "https://sciencebasedkids.com/reviews/ergopouch-cocoon-swaddle/",
            "source_read_at": "2026-10-23T20:20:56.487Z"
          }
        },
        {
          "column": "Zip problems reported",
          "fact": null
        },
        {
          "column": "Zip in use",
          "fact": {
            "field": "one zip, quick but not foolproof",
            "value": "The blog says one zip is all it takes, but squirmier babies make the zip-everything-in step awkward and you may feel you need a third hand.",
            "stated_as": "The blog says one zip is all it takes, but squirmier babies make the zip-everything-in step awkward and you may feel you need a third hand.",
            "source_type": "blog",
            "source_url": "https://www.alsomom.com/ergopouch-ergococoon-review/",
            "source_read_at": "2026-10-23T20:20:55.628Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "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 time",
          "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 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"
          }
        },
        {
          "column": "Zip in use",
          "fact": {
            "field": "sleep and sizing",
            "value": "For a 10-week-old it gave the best night's sleep reported so far, with the double zip making night feeds and nappy changes quick, though the 3-6 month size looked huge next to the 2-3 month.",
            "stated_as": "For a 10-week-old it gave the best night's sleep reported so far, with the double zip making night feeds and nappy changes quick, though the 3-6 month size looked huge next to the 2-3 month.",
            "source_type": "review",
            "source_url": "https://www.productreview.com.au/listings/ergopouch-ergococoon-swaddle",
            "source_read_at": "2026-10-11T20:52:18.326Z"
          }
        }
      ]
    }
  ]
}