FR Base Layer — Bottom

Companion piece to the FR crew, cut for freedom of movement under duty pants or bunker gear. Sold as part of a matched base-layer set or standalone.

Military personnelFirefighters

Fit: Slim, gusseted crotch for mobility
Fabric weight: ~6.7 oz/yd² (mill datasheet)
Colorway: Coyote, Black
Sizes: XS–3XL

Available sizes / variants

XSSMLXL2XL3XL

Same fiber blend as the FR crew, illustrative weight ~6.7 oz/yd². Mill datasheet on file; independent verification not yet completed.

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Performance claims & evidence status

Claims are grouped by what actually backs them. We show empty groups honestly rather than implying evidence we don't have.

Independently verified

No claim for this item has an independent lab report or third-party test behind it yet. We'll move claims here — and link the source — the moment testing is complete.

Testing planned / in progress

NFPA 2112 vertical flame test
Scheduled in the same accredited-lab test cycle as the FR crew.

Unverified marketing claims

Unverified marketing claim

Inherently flame-resistant fiber blend
Same mill claim as the FR crew; independent lab confirmation is pending.
Seam durability under repeated laundering
Marketing note from the cut-and-sew partner; no wash-cycle test data exists yet.