403 PB Vest

A safety vest made by EZ-ON Products, based in Jupiter, Florida.


This vest is made of webbing and features an adjustable, two-buckle front closure, providing upper-body restraint. (Not appropriate for children who are prone to unbuckle during transport; for these children, select either a 303Z or MAXPV vest that zips up the back.) An adult must ensure the vest is properly adjusted, seat the vest-wearing child in a vehicle seat that has an installed EZ-ON floor mount or tether mount, and attach the vest to the mount at each mounting point.

NOTE:  For anchorage to the vehicle, this safety vest must be used with either of the model-appropriate mounts described here.

  • The floor mount (100FM) requires two tether anchors (included) to be professionally installed in the vehicle and the ability to slip the strap through the seat bight.  
  • The tether mount (100TM) requires the use of one tether anchor (can be factory-installed or purchased from EZ-ON and installed) as well as a vehicle seat belt (or LATCH lower anchors, if a separate Lower LATCH Add-on is purchased).

Last updated on February 1, 2024.

Child Requirements

  Pounds Kilograms Inches Centimeters Age (years)
Minimum 31 14.1 no limit no limit 3
Maximum 168* 76.2* no limit no limit no limit

* At higher weights, the vest may also be used as a positional support device if a lap-shoulder belt is worn in the typical fashion over the vest-wearing child (rather than through the vest’s loops).

Measurements and Characteristics

Car Seat Mass (Weight)

< 5 lbs./ 2.3 kgs

Vehicle Fit Characteristics

  Outside height: n/a; no plastic shell
  Widest outside width: n/a; no plastic shell
  Vehicle requirements:
  • If paired with an EZ-ON 100TM mount, vehicle must have a tether anchor. EZ-ON approves tether use at all allowed vest-use weights, but check to see if the vehicle manufacturer sets a limit for use of the tether anchors. Also requires a seat belt unless a Lower LATCH Add On (#225 A) is purchase and used to replace a seat belt. (The vehicle must be equipped with LATCH to use part #225 A.)
  • If paired with an EZ-ON 100FM mount, tether anchors must be professionally installed in the vehicle floor (maximum child weight limit is 168 pounds) and the seat bight must allow the straps/hardware to slip through.

Vest Fit Characteristics

  Chest measurements (circumference):  
  XS: 18–24 inches/ 46–62 cm
  Small: 25–32 inches/ 63–82 cm
  Medium: 32–37 inches/ 82-94 cm
  Large: 37–43 inches/ 94-109 cm
  Custom sizing available: Yes
  Crotch strap present: Yes, on XS, Small, and Medium; order as an add-on for size Large.
  Crotch strap adjustability: Yes; Dual straps, each length-adjustable. (A crotch strap extender accessory is no longer available).


 No recline option available; child must be capable of sitting upright (with support of the vest).


  Tether present: Yes, on mount (floor mount or tether mount).
  Special tethering:
  • If using FM100 (floor mount), the mount’s tether attaches to two heavy-duty tether anchors (included) that the owner has had professionally installed into the vehicle floor, behind the seat.
  • If using the T100 (tether mount) and child exceeds a tether anchor weight limit stated by the vehicle manufacturer, must have a heavy-duty TA (supplied by EZ-ON) professionally installed.

Accessories / Add-ons

  • Neck pads (covers shoulder straps)
  • Movement restricting devices: Upper arm straps, wrist straps, ankle straps
  • Snap hook with wings (deterrent to unbuckling at shoulders or hips)
  • Zipper lock (additional deterrent for escapism)
  • Tether anchor retrofit kit (for use with TM100 in vehicles without a factory-installed tether anchor; ensure vehicle maker allows use)
  • Lower LATCH add-on (may replace use of a seat belt in vehicles with LATCH).

Miscellaneous Information

  • MSRP (U.S. dollars): $200.00
  • Company certifies to meet standard:
    • FMVSS213 (U.S.): Yes, if 100TM mount is used.
    • CMVSS 213 (Canadian): No
  • Will ship to Canada? Yes
  • Owner’s manual languages available: English

Learn More ● Get in Touch

Note: Clicking on links will take users to a different website