How to Choose an ESD Jacket

ESD jackets — also called ESD smocks or ESD lab coats — protect sensitive electronic components from electrostatic fields generated by the clothing underneath. ESD jackets are made with a grid of conductive fibers woven throughout the fabric. This grid creates a Faraday cage effect around the operator's body, shielding nearby ESD-sensitive devices from charges generated by the clothing beneath. The conductive fibers also reduce tribocharging — static generation from fabric movement — to a safe level.

ESD Jackets as Part of a Complete ESD Program

ESD jackets are the most visible sign of an ESD control program, and any facility that mandates them demonstrates a serious commitment to ESD protection. They are a recommended addition to a program that already includes grounding measures like wrist straps and heel grounders. As ESD TR20.20-2008 notes: "While a person may be grounded using a wrist strap or other grounding methods, that does not mean that insulative clothing fabrics can dissipate a charge to that person's skin and then to ground. Personnel clothing usually is electrically separate or isolated from the body." This is exactly why garments matter even when other grounding is in place.

ESD Properties: The Most Important Factor

ANSI/ESD S20.20 defines three levels of ESD garment performance:

• Level 1 — Static Control Garment: Surface resistivity < 1 × 10¹¹ Ω. Lowest cost; basic static reduction. May wear out faster and need more frequent replacement.
• Level 2 — Groundable Static Control Garment: Surface resistivity < 1 × 10⁹ Ω. Mid-range performance; can be grounded for improved protection.
• Level 3 — Groundable Static Control Garment System: Surface resistivity < 3.5 × 10⁷ Ω. Highest performance; conductive enough that the fabric itself can serve as part of the wrist strap ground path, enabling hands-free grounding.

Always verify ESD properties before purchasing. Use a Surface Resistance Meter to perform a sleeve-to-sleeve measurement — this confirms electrical continuity across garment panels. Test regularly, as laundering and wear degrade ESD properties over time.

Fabric Composition

Most ESD jackets use a carbon/polyester blend or a carbon/cotton/polyester blend. The carbon content is what makes the jacket ESD-safe — more carbon means better antistatic performance and longer service life. Low-cost jackets may have less than 5% carbon content and may not perform well or last as long. Your fabric choice will also depend on operator comfort: lightweight polyester works well in warmer environments, while cotton blends are better suited to cooler conditions.

Collar Options

Three collar styles are available, each offering different coverage of the clothing underneath:

• Lapel collar — the most common; a good balance of coverage and comfort
• V-Neck collar — most open; cooler to wear but exposes more clothing
• Military collar — maximum coverage; best for high-sensitivity applications but less comfortable for extended wear

Sleeve Terminations

ESD jackets come with one of two cuff styles:

• Snap cuff — three adjustable snaps for a customizable fit; ideal when wrist straps are already in use or when wearers find knit cuffs too snug
• ESD knit cuff — forms a continuous contact path around both wrists for hands-free grounding when connected to a ground cord at the hip pocket snap

Length

ESD jackets come in three lengths — choose based on how much of the underlying clothing needs to be shielded:

• Waist length — most clothing exposed; cooler and more comfortable
• 3/4 length — mid-thigh coverage; a practical middle ground
• Full length — knee-length coverage; maximum shielding, sometimes called a lab coat

Color and Embroidery

Color has no effect on ESD performance — it's purely a preference. Blue is the most common, but many facilities use color coding: employees in blue, management in black, visitors in white. High-visibility jackets are also available for safety-critical environments. Company logos and employee names can be added via embroidery, sublimation, screen printing, or patches — note that custom color dyeing typically requires a high minimum order quantity.

Summary: How to Choose an ESD Jacket

Start with ESD properties — confirm the Level rating and verify with a surface resistance meter. Then choose fabric for comfort, collar for coverage, cuff style for your grounding setup, and length for your application. Color and embroidery are last. Browse our full selection of ESD jackets filtered by all of these criteria to find the right fit for your program.