§ 1241.2 Requirements for crib mattresses.

(a) Except as provided in paragraph (b) of this section, each crib mattress must comply with all applicable provisions of ASTM F2933-25 (incorporated by reference, see § 1241.3).

(b) Comply with ASTM F2933-25 with the following additions or exclusions:

(1) Instead of complying with section 5.6.1.1 of ASTM F2933-25, comply with the following:

Mattress Size1/45/8(i) 5.6.1.1 —The dimensions of a full-size crib mattress shall measure at least 27 in. (690 mm) wide and 51 in. (1310 mm) long. When the mattress with the test mattress sheet is placed against the perimeter and in the corner of the crib, the corner gap shall not exceed 3.15 in. (80.0 mm). Dimensions shall be tested in accordance with 6.2.

(ii) [Reserved]

(2) Instead of complying with section 5.6.2 through 5.6.2.2 of ASTM F2933-25, comply with the following:

Non-Full-Size Crib Mattresses(i) 5.6.2 —For the purposes of this section, the term product refers to a non-full-size crib.

Mattress supplied with a non-full-size crib:Stability; Cord/Strap Length; Mattresses for Rigid sided products;Crib Side Height.(ii) 5.6.2.1 Shall meet the applicable requirements of the following sections of ASTM F406 (incorporated by reference, see § 1241.3) when tested with the product with which it is supplied: and (See16 CFR part 1220 for the Safety Standard for Non-Full-Size Baby Cribs.)

After-market mattresses for non-full-size cribs:Stability; Cord/Strap Length; Mattresses for Rigid sided products;Crib Side Height.(iii) 5.6.2.2 Shall be treated as though the mattresses were “the mattress supplied with a non-full-size crib” and shall meet the applicable requirements of the following sections of ASTM F406 when tested to the equivalent interior dimension of the product for which it is intended to be used: and (See 16 CFR part 1220 for the Safety Standard for Non-Full-Size Baby Cribs.)

(iv) 5.6.2.3 The after-market mattress must be at least the same size as the original equipment mattress or larger and lay flat on the floor of the product, in contact with the product mattress support structure.

(v) 5.6.2.4 If the original equipment mattress includes a floor support structure, the after-market mattress must include a floor support structure that is at least as thick as the original equipment mattress floor support structure.

(vi) 5.6.2.5 If the original equipment mattress includes storage accommodations for the product instruction manual, the after-market mattress shall provide equivalent storage accommodations for the product instruction manual.

(3) Instead of complying with section 5.8 through 5.8.1.2 of ASTM F2933-25, comply with the following:

After-Market Mattress for Play Yard(i) 5.8 —For the purposes of this section, the term “product” refers to a play yard.

(ii) 5.8.1 For Mesh/Fabric Sided Play Yard Products.

Stability; Cord/Strap Length; Mattress; Height of Sides; Floor Strength; Mattress Vertical Displacement.(A) 5.8.1.1 The after-market mattress and product it is tested in shall meet the applicable requirements of the following sections of ASTM F406 when tested with each brand and model of product for which it is intended to replace the mattress: (See 16 CFR part 1221 for the Safety Standard for Play Yards.)

Mattress Thickness for Fabric or Mesh Sided Products; Mattress dimensions; Side Height; Bassinets with Segmented Mattresses.(B) 5.8.1.2 If the aftermarket mattress is intended to be used in the bassinet of a play yard with a bassinet attachment, the mattress shall also meet the applicable requirements of the following sections of ASTM F2194 (incorporated by reference, see § 1241.3) when tested with each brand and model for which it is intended to replace the mattress: This paragraph applies only to a play yard mattress that is interchangeably used as a play yard mattress and as a bassinet mattress/pad. (See 16 CFR part 1218 for the Safety Standard for Bassinets and Cradles.)

(4) Renumber section 6.2.2 of ASTM F2933-25 to section 6.2.3.

(5) Renumber section 6.2.2.1 of ASTM F2933-25 to section 6.2.3.1.

(6) Renumber section 6.2.2.2 of ASTM F2933-25 to section 6.2.3.2.

(7) Renumber section 6.2.2.3 of ASTM F2933-25 to section 6.2.3.3.

(8) Renumber section 6.2.2.4 of ASTM F2933-25 to section 6.2.3.4.

(9) Add the following paragraphs to section 6.2.3 of ASTM F2933-25:

(i) 6.2.3.5 The test mattress sheet shall be placed on the mattress such that each sheet edge is wrapped fully around and under the mattress.

1/85/81/8(ii) 6.2.3.6 Repeat step 6.2.3.2. Then measure the shortest gap between the mattress and the projected crib corner after the dimensions of the mattress have been recorded. The projected crib corner is located 53 in. ± in. (1346 mm ± 3.2 mm) from Wall C and 28 in. ± in. (727 mm ± 3.2 mm) from Wall D, as shown in Fig. 12. The mattress shall not be moved during measurement. This shall be the corner gap measurement.

(iii) 6.2.3.7 Rotate the mattress 180° such that the opposing corner is adjacent to Walls C and D, then repeat 6.2.3.6.

(10) Instead of complying with section 6.2.2 of ASTM F2933-25, comply with the following:

(i) 6.2.2 Test Equipment-Mattress Sheet. (A) 6.2.2.1 The mattress sheet shall be 100% cotton and fitted for the mattress to be tested.

(B) 6.2.2.2 The mattress sheet shall be washed in hot water (50 °C [122 °F] or higher) and dried a minimum of two times on the highest setting using household textile laundering units. This shall be the test mattress sheet.

(ii) [Reserved]

(11) Add the following Figure to section 6 of ASTM F2933-25: Figure 12.

Figure 12. Projected Crib Corner and Corner Gap Measurement Location

[87 FR 8673, Feb. 15, 2022; 87 FR 41060, July 11, 2022, as amended at 91 FR 6515, Feb. 12, 2026]