RST Race Dept D3O Back Protector Harness | Men's | 103671

Wearing a leather race suit should never mean compromising on spinal protection, and the RST Race Dept D3O Back Protector Harness is built precisely to close that gap. Engineered to sit securely against your body via an independent harness system, it delivers certified D3O Level 2 back protection with a fit so dialled-in you will forget you are wearing it — whether you are on a trackday or a long Sunday blast.

Key Features

• D3O Level 2 back protection: one of the highest-rated impact-absorption standards available, combining flexibility during normal movement with firm resistance on impact
• Memory foam coccyx pad adds a dedicated layer of protection to the lower spine, an area often left exposed by suit-integrated protectors
• Dual hip closure locks the harness firmly in place, preventing upward or lateral shift during aggressive riding
• Adjustable shoulder straps let you fine-tune the fit to your exact torso length, keeping the protector centred on your spine all day long
• TPR pull tabs make on-the-fly adjustments quick and straightforward, even with gloves on
• 3D mesh outer construction promotes airflow across the back, managing heat and moisture during extended wear under close-fitting leathers
• Compatible with all RST suits without an integrated airbag system, allowing you to add Level 2 protection without replacing your existing gear

All-Day Fit — the Harness Advantage

Unlike protectors that rely on your jacket's back pocket to stay in position, the RST Race Dept D3O Harness anchors independently to your body. The adjustable shoulder straps combine with the dual hip closure to create a stable, three-point retention system that moves with you rather than against you. Once set up correctly for your proportions, the harness sits flush against the spine and stays there through corner after corner — no bunching, no riding up, no distraction. The TPR pull tabs mean even small mid-session tweaks take seconds, and the whole system remains discreet enough to disappear beneath any RST leather suit without creating pressure points or unwanted bulk.

D3O Level 2 Protection with Coccyx Coverage

The centrepiece of this harness is its D3O back protector, certified to Level 2 — the premium tier within the CE back protector classification. D3O's rate-sensitive material is pliable and comfortable at low energy, yet locks rigid to spread and absorb energy on impact. For riders who demand the best available protection without sacrificing wearability, Level 2 is the standard to seek out. Complementing the main protector, the memory foam coccyx pad covers the tailbone region, addressing a vulnerability that a spine-only protector leaves unguarded. It is a thoughtful addition that rounds out the protection package for track and road use alike.

Breathable Construction for Extended Comfort

A protection system you are reluctant to wear because it is uncomfortable is one that offers no real benefit. RST addresses this directly with a 3D mesh outer fabric that channels air across the back even when sandwiched beneath a snug leather suit. The open structure reduces heat build-up and helps manage perspiration during sustained effort, whether that is a full race weekend or a long motorway transfer to the circuit. Comfort over distance is where this harness earns its place in your kit bag.

Fitment and Compatibility

The RST Race Dept D3O Back Protector Harness is designed to be worn under RST leather suits that do not feature an integrated airbag system. It is the ideal standalone upgrade for riders whose suit lacks a built-in back protector pocket or who wish to step up from Level 1 to Level 2 coverage. Available in sizes S, M, and L to suit a range of male riders. Please note: the base layer shown in product imagery is not included.

Specifications