Your stirrups are the last point of contact between you and your horse in the event of a fall, yet for most riders, they're the last piece of equipment that gets an upgrade. If you're still riding in the same stainless steel Fillis irons your trainer handed you ten years ago, this guide is for you.
The safety stirrup market has evolved dramatically. Today's top options from brands like Flex-on and Herm Sprenger combine genuine release technology, ergonomic footbeds, and premium materials that reduce fatigue and protect your joints without sacrificing the clean, classic look that English disciplines demand.
Here's everything you need to know to choose the right pair, broken down by mechanism, material, discipline, and budget.
Why Stirrup Safety Matters More Than You Think
The risk of a dragging fall — where a rider's foot gets caught in the stirrup — is one of the most serious hazards in equestrian sport. Traditional closed-sided Fillis stirrups, while elegant and time-tested, offer no mechanism to release the foot if you come off.
Modern safety stirrups solve this problem in different ways, but the goal is always the same: allow the foot to exit freely under force, then return to a rideable position when you're back in the saddle.
Beyond fall prevention, today's safety stirrups also address a second, quieter problem: joint wear. Riders who log serious hours in the saddle — training five or six days a week, showing year-round — are putting real cumulative stress on their knees, ankles, and hips. An inclined footbed and flexible side arm can meaningfully reduce that load over a season.
Traditional vs. Safety: Understanding the Difference
The Classic Fillis Stirrup
The Fillis is the foundational English stirrup with straight sides, a flat tread, and an open top bar that slots onto the stirrup leather. It's simple, elegant, and effective for the basics. Herm Sprenger's Fillis irons are the gold standard of this category, crafted in Germany with precision stainless steel and available in several finishes.
Shop: Herm Sprenger Fillis Stirrups — from $97.90
The Fillis is still a perfectly respectable choice for lower-intensity riding and leisure work. But if you're competing, jumping, or logging serious training hours, the options below offer meaningful advantages.
What Makes a Stirrup "Safe"?
Safety stirrups fall into a few broad categories based on how they allow foot release:
- Magnetic release: The outer branch closes magnetically and opens under sideways pressure. The magnet resets automatically between rides.
- Flexible side arm: One or both sides of the stirrup flex under load, creating a larger exit path for the foot.
- Open outer side: The outer branch is permanently open or hinged so that the foot can slip free laterally in a fall.
- Inclined footbed: Not a release mechanism per se, but an angled tread (typically 15°–20°) keeps the heel down naturally and reduces ankle torque — an ergonomic safety feature.
The best modern stirrups often combine multiple features: a release mechanism, an inclined footbed, and a high-grip tread surface.
Flex-on: The French Safety Stirrup Benchmark
Flex-on has become the dominant name in performance safety stirrups at the professional level, and for good reason. Their proprietary Inclined Ultra Grip (IUG) footbed sits at a 15° angle, mimicking the natural alignment of the foot and ankle in motion and keeping the heel down without the rider having to think about it.
The outer side of each Flex-on stirrup closes via a magnetic system that releases cleanly under lateral force. After a fall, it resets automatically. The grip tread is vulcanized rubber with a stainless-steel inlay — secure in mud, in rain, and when your boot sole is less than perfect.
Flex-on The Safe-On Stirrup
Price: $349.00 | Shop Black/Black | Shop Grey
The Safe-On is Flex-on's entry point into their safety system, and it's still a serious stirrup. Steel construction keeps the price accessible while delivering the same magnetic release mechanism and inclined footbed as the higher-tier models. Available in black/black and grey, both of which read clean and classic in the ring.
Best for: Riders upgrading from a traditional Fillis for the first time, junior competitors, and adult amateurs who want genuine safety technology without the premium price.
Flex-on The Aluminium Stirrup
Price: $395.00 | Shop Silver/Black | Shop Rosegold/Black
The step up to aluminum cuts weight noticeably — something long-distance eventers and high-mileage trainers will appreciate across a full day. The Rosegold/Black colorway has become a quiet favorite among dressage riders who want a touch of warmth in their tack without going full crystal-and-bling.
Best for: Eventers, professional riders, and dressage riders wanting an elevated finish.
Price: $395.00 | Shop Chrome/Grey
The Hunter H is Flex-on's answer for the hunter ring, where the aesthetic is everything. The H-shaped outer branch gives it a more traditional silhouette than the standard Aluminium model, while the chrome finish reads as polished and classic rather than technical. All the same safety and ergonomic features underneath.
Best for: Hunter/jumper riders who want modern safety technology with a conservative, ring-appropriate look. No flash. No bling. Just clean.
Acavallo Arena Aluplus 2.0: The Italian Alternative
Price: $331.80 | Shop Acavallo Arena Aluplus 2.0
Acavallo is an Italian brand that doesn't get enough attention in the US market, so riders who discover it tend to feel like they've found something. The Arena Aluplus 2.0 is their flagship safety stirrup, and it's a genuinely well-engineered piece of kit that holds its own against the French and German competition.
The construction is fully anodized aluminum with a stainless steel tread — lightweight, corrosion-resistant, and built to last. The safety mechanism is a patented lateral-opening arm, but Acavallo has carefully considered two common failure points that plague other safety stirrups: accidental release and dirt interference.
Their solution on both counts is smart. The release mechanism is positioned one centimeter above the tread level, which means sideways foot pressure during normal riding doesn't trigger it, only the sharper lateral force of a genuine fall does. The opening mechanism itself sits at the top of the stirrup, where sand and arena footing can't pack into it, slowing the release in an emergency. Long horizontal slots in the tread body further prevent dirt accumulation while maintaining grip.
The footbed is inclined at 5 degrees — slightly less than the Flex-on's 15 degrees, which some riders actually prefer. It's a subtler angle that doesn't force the position as dramatically, making it a good fit for riders who want ergonomic support without feeling like they're adjusting to a new footbed.
Best for: Riders who want a lightweight aluminum safety stirrup with genuine lateral release, a subtler incline than Flex-on, and an Italian aesthetic that's clean without being flashy. Strong across all disciplines — the classic aluminum finish works equally well in the hunter ring, dressage arena, or on cross-country.
Herm Sprenger: German Engineering, Every Price Point
Herm Sprenger has been manufacturing precision equestrian hardware in Iserlohn, Germany, since 1872. Their stirrup range spans from the entry-level Fillis to the AERO — a professional-grade aluminum safety stirrup that represents the current pinnacle of their development.
Herm Sprenger System-4
From $305.90 | Shop System-4 Stainless Steel | Shop System-4 with Offset Eye
The System-4 is Herm Sprenger's foundational ergonomic stirrup. Four flexible side arms allow the tread to move naturally with the rider's foot, distributing pressure more evenly and reducing the rigid shock that a fixed stirrup transmits through the ankle and knee. The Offset Eye version adds a rotated bar at the top, aligning the stirrup leather's pull with the natural angle of the rider's leg — a meaningful difference for riders with knee sensitivity.
Best for: Dressage riders, adult amateurs with joint concerns, and riders who spend long hours in the saddle.
Herm Sprenger Bow Balance
$305.90 | Shop Bow Balance Stainless Steel
The Bow Balance features a curved outer arm that creates an asymmetric, body-aligned footbed. This isn't just an aesthetic choice — the bow shape shifts the rider's weight slightly inward, encouraging a more balanced, centered position. It's become particularly popular in the dressage community as a training aid for riders working on straightness and alignment.
Best for: Dressage riders, equitation riders, and riders working with a biomechanics-focused trainer.
Herm Sprenger Flexcite
From $333.90 | Shop Flexcite Stainless Steel | Shop Flexcite Grip
The Flexcite adds a flexible outer side arm to the System-4's foundation, creating a genuine safety release in addition to the ergonomic benefits. When pressure is applied laterally — as in a fall — the outer arm flexes away, freeing the foot. The Flexcite Grip version adds a higher-traction rubber and stainless steel tread surface for riders who want maximum grip security.
Best for: Show jumpers, eventers, and riders who want Herm Sprenger's joint-protection system plus a safety release mechanism.
Herm Sprenger AERO Safety Stirrups
$455.90 | Shop AERO Black | Shop AERO Silver
The AERO is Herm Sprenger's premium safety stirrup featuring aluminum construction for reduced weight, a wide composite footbed for pressure distribution, and a safety-release outer side. At $455.90, it's a serious investment, but one that serious riders make once and keep for years. The aluminum body is notably lighter than stainless steel, and the weight reduction is felt during long training sessions and full show days.
Best for: Professional riders, Grand Prix competitors, eventers, and anyone who has reached the top of the Herm Sprenger range and wants to stay there.
Choosing by Discipline
Hunter/Jumper
The hunter ring is conservative — classic chrome or stainless is always correct. The Flex-on Hunter H was designed specifically for this world: safety technology wrapped in a traditional silhouette. For jumpers who want a bolder performance statement, the Flex-on Aluminium in Silver/Black is a clean, professional choice.
What to avoid: anything too angular, too technical-looking, or with colored accents that read as casual. The Herm Sprenger Fillis in white or black rubber pad is still perfectly appropriate for hunters who prefer to keep things classically simple.
Dressage
Dressage allows for more personality in tack, and that shows in stirrup choice. The Flex-on Aluminium in Rosegold/Black has found a genuine following here — warm, elegant, and elevated. The Herm Sprenger Bow Balance is a coaching favorite for riders working on position, and the System-4 with Offset Eye is the ergonomic workhorse for adult amateurs who train frequently.
At the top of the range, the AERO in silver is a show-ring statement piece that photographs beautifully against a dark boot.
Eventing
Eventing riders have the most demanding checklist: genuine safety release for cross-country, grip and durability for all-weather conditions, and enough ergonomic support to get through dressage and show jumping before the course. The Flex-on Safe-On or Aluminium is the most common choice at the upper levels — the magnetic release is fast, reliable, and resets automatically.
The Acavallo Arena Aluplus 2.0 is also worth serious consideration for eventers — the dirt-shedding footbed slots and top-mounted safety mechanism are purpose-built for variable cross-country conditions. The Herm Sprenger Flexcite rounds out the options for riders who prefer the German brand's feel.
Quick Buying Checklist
- Safety mechanism: Do you need a release system, or is ergonomic support your primary goal?
- Material: Stainless steel is durable and classic. Aluminum is lighter — meaningful for long days.
- Footbed angle: An inclined footbed (15°–20°) keeps the heel down and reduces ankle fatigue.
- Grip tread: Ultra-grip rubber or rubber-and-steel inlay gives better contact in wet conditions.
- Aesthetics: Hunter ring = clean chrome or stainless. Dressage = more latitude. Match your discipline's culture.
- Budget: Fillis irons from $97 are a fine starting point. Premium safety stirrups from $305–$455 are a one-time investment that outlasts most other tack.
Shop Safety Stirrups at Dapper Horse
We carry the full Herm Sprenger stirrup range and the complete Flex-on lineup, and the Acavallo Arena Aluplus, all in stock and shipping from our Brewster, NY warehouse. Not sure which model is right for you? DM us on Instagram or email orders@dapperhorse.com, and we'll help you narrow it down.