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S3C - Lap/Shoulder Seat


SynTec Seating is the industry leader in school bus seating solutions. Our innovative S3C Lap/Shoulder Seats are designed for flexibility and convenience while maintaining the highest safety standards. SynTec’s Lap/Shoulder Seats come in a variety of widths to accommodate up to three passengers and can be configured for wall, floor or track mounting.

To ensure proper use of seat belts, the Lap/Shoulder Seats utilize color-coded, retractable seat belts with a keyed system to prevent misuse. Safety should be at the core of every design when it comes to school bus seating. That’s why each feature of the Lap/Shoulder Seat is designed with safety in mind. For enhanced protection, the Lap/Shoulder Seat includes material options such as Kevlar or Fireblock. Looking for a variation from the traditional seat color? SynTec offers the Lap/Shoulder Seat in a variety of color options to fit your needs.

The Lap/Shoulder Seat meets all FMVSS and CMVSS requirements and can be easily converted into one of SynTec’s other school bus seating solutions, such as the Integrated Child Seat or the Restraint Seat (Lap Belt Ready).  With no loss for capacity, the S3C Lap/Shoulder Seat’s unique design allows the seat to be converted to and from any configuration in less than 2 minutes without removing the seat. Time saving for employees and cost-effective for school districts. Another great feature of this Lap/Shoulder Seat, and SynTec’s other school bus seating products, is the ability to retrofit any SynTec seat to fit any buses body style and all Thomas buses.


  • Available as one, two or three passenger Lap / Shoulder seats
  • 26", 30", 36", 39" and 45" widths
  • Flexible 39” 3-2 Passenger
  • Same footprint as S3B Base Seats – Mix and match with S3B Base seats in the same bus
  • Available in Wall / Floor / Track mount configurations
  • Meets all FMVSS requirements
  • Easily Convertible to Integrated Child Seat or Restraint Seat
  • Seat belts and buckles color-coded and keyed to deter mis-use
  • Seat belt buckles automatically retract into seat back when not in use
  • Non-sliding buckles keep the passenger in the correct position in a side impact
  • Passengers slide easily in/out of seat without buckle interference
  • Automotive seat belt hardware that has been tested and approved worldwide
  • Convertible to either Lap Belt Ready or ICS configuration in less than 2 minutes

ONE DEPENDABLE SUPPLIER – SynTec Seating Solutions

For more information about our Lap/Shoulder Seats, please contact us.

Maintenance Benefits

  • Zip-on seat back cover for rear panel can be quickly replaced without removing the seat belts (Lap / Shoulder and ICS configurations)
  • Self-latching seat cushion can be removed or replaced in seconds

Standard Configuration

  • 39″ Lap Shoulder seat FMVSS / CMVSS 222 compliant convertible school bus seat
  • Exclusive Zip on/off seat back cover
  • 42 oz. vinyl upholstery
  • Same footprint as S3B Base Seating System

Optional Configurations

  • Lap / Shoulder Flexible 39” 3-2 Passenger
  • Lap / Shoulder 39” 3-2 Seat
  • Integrated Child Seat
  • Flip Seat
  • Davenport Seating 3x3 Passenger
  • 26″, 30″, 36″, 39″ and 45″ widths


  • Color Options: Green / Blue / Grey
  • Material Options: 42 oz. / Kevlar / Fireblock
  • Side: Left Side, Right Side
  • Mount: Wall Mount, Floor Mount, Track Mount
  • ISO: ISO Lower Anchors and Tethers for Children
  • Lap Belts: Colored