Bulwark Men's FR Long Sleeve Base Layer with Concealed Pocket

The Bulwark Men's FR Long Sleeve Base Layer with Concealed Pocket is a CAT 1 arc-rated flame-resistant shirt designed to anchor your FR layered system. Built from Bulwark's Excel FR® fabric — a 5.5 oz. 90/10 cotton-polyester blend — it delivers reliable arc flash and flame protection while staying lightweight and breathable enough for all-day wear. The concealed chest pocket adds discreet storage, and the heat-seal Bulwark® triangle at the collar signals FR compliance to safety managers without a word.

Key Features

• CAT 1 Arc Flash Protection — Arc Rating ATPV 6.4 cal/cm²; meets NFPA 70E requirements for CAT 1 PPE
• Excel FR® Fabric — 5.5 oz. (185 g/m²), 90% Cotton / 10% Polyester; inherently flame resistant
• Moisture Management Finish — wicks sweat to keep you dry during high-exertion work
• Concealed Chest Pocket — one hidden pocket for secure, low-profile storage
• Contrast Mesh Underarm Gussets — full range of motion with added ventilation
• Raglan Sleeves — hemmed for a clean finish and unrestricted movement
• Self-Fabric Crewneck Collar — comfortable, durable, and snag-resistant
• FR Compliance Indicator — heat-seal Bulwark® triangle at neck signals to safety managers that an FR undergarment is being worn
• Home Washable — standard home wash care; FR protection is inherent to the fabric, not a topical treatment

Specifications

• Brand: Bulwark
• Style: MPS8
• Color: Tan
• Arc Rating: ATPV 6.4 cal/cm²
• Protection Category: CAT 1
• Fabric: Excel FR® — 5.5 oz. 90% Cotton / 10% Polyester
• Finish: Moisture Management
• Pocket: One Concealed Chest Pocket
• Origin: Imported fabric, Made in USA
• Care: Home Wash

Quick Decision Guide

• Need a CAT 1 FR base layer for arc flash environments? → This shirt meets NFPA 70E CAT 1 requirements at 6.4 cal/cm².
• Building an FR layered system? → Pair with FR pants or an FR coverall with a minimum 4 cal/cm² arc rating to complete your CAT 1 ensemble.
• Working in hot or high-exertion conditions? → The moisture management finish and mesh underarm gussets help regulate temperature.
• Need higher arc protection? → Ask us about CAT 2 and CAT 3 FR options from Bulwark.

Frequently Asked Questions

What does CAT 1 mean?
CAT 1 (Category 1) is the entry-level arc flash PPE category under NFPA 70E. It requires a minimum arc rating of 4 cal/cm². This shirt's 6.4 cal/cm² ATPV exceeds that minimum, providing a margin of safety.

Is the FR protection permanent?
Yes. Excel FR® fabric is inherently flame resistant — the protection is built into the fiber, not applied as a topical treatment, so it won't wash out over time.

Can this be worn as a standalone FR shirt?
Yes for CAT 1 environments when paired with FR pants or an FR coverall. It functions as a base layer in higher-category layered systems.

What does the heat-seal triangle at the collar indicate?
The Bulwark® triangle signals to safety managers that the wearer has an FR undergarment on — useful for compliance verification in the field.

Is this shirt available in other colors or sizes?
Currently available in Tan, XL. Contact us if you need additional sizes or colors.