Spartan Race courses are not gentle on apparel. Between the mud pits, water carries, barbed wire crawls, and hundreds of burpees, your shorts have to survive conditions that would shred ordinary gym gear. Compression shorts solve a specific set of problems on these courses, locking the upper leg muscles in place, reducing chafing between long carries, and providing a stable base layer under any outer short you choose.
This guide compares five compression shorts that experienced obstacle racers wear at Sprint, Super, Beast, and Ultra distances. Pricing and fit vary by retailer and season, so confirm sizing against the manufacturer chart and check current availability before ordering.
Comparison at a Glance
| Brand | Inseam | Fabric | Liner | Best For |
|---|---|---|---|---|
| Path Projects Sykes PX | 8 inch | Recycled poly elastane | Yes | Long-distance obstacle racing |
| 2XU MCS Run Compression | 9 inch | PWX FLEX | No | Endurance and recovery |
| Tough Mudder Compression Short | 7 inch | Poly elastane | Yes | Sprint and Super distances |
| Reebok Sandstone Compression | 8 inch | Speedwick | No | Heavy obstacle volume |
| Path Projects Torrey CL | 7 inch | Cool-touch knit | Yes | Hot-weather racing |
Path Projects Sykes PX - Verdict
Path Projects designs technical apparel for trail and ultra runners, and the Sykes PX has become a favorite among Spartan racers who run multiple events per season. The eight-inch inseam covers enough of the thigh to prevent crawl-zone abrasion without restricting the deep hip flexion needed for over-walls and rope ascents.
The recycled polyester and elastane blend drains water quickly, which matters when you exit a submersion obstacle and need to keep running without two pounds of trapped weight per leg. The built-in liner uses a soft mesh that does not bind when wet, and the flat-locked seams resist the chafing that destroys lesser shorts at the inner thigh.
Sizing runs true to the chart, and the waistband uses a wide flat band that stays put across hours of motion. Color options stay limited to functional darks. Pricing sits at the upper end of the category, justified for racers who train and compete in the shorts week after week.
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2XU MCS Run Compression - Verdict
2XU built the MCS line for endurance athletes who care about graduated compression, and the Run Compression short translates that engineering to obstacle racing well. The PWX FLEX fabric provides firmer compression than most trail-running shorts, which helps quad and glute fatigue across a Beast or Ultra distance.
The nine-inch inseam is the longest in this guide, which provides extra abrasion coverage under wire crawls but also takes longer to drain after submersion. Racers who run faster Sprint distances sometimes find the length excessive. For longer events where muscle support matters more than weight, the trade is favorable.
There is no built-in liner, so most men pair the shorts with a lightweight athletic brief. The waistband uses a draw cord rather than a wide flat band, which some racers prefer for adjustment mid-course. Durability is excellent across repeated wet-dry cycles, and the shorts hold their compression past most competitors.
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Tough Mudder Compression Short - Verdict
Tough Mudder licenses apparel under its name that targets first-time and recreational obstacle racers, and the compression short fits that brief. The seven-inch inseam is shorter than the Path Projects and 2XU options, which favors hot-weather racing and shorter Sprint distances where mobility matters more than full thigh coverage.
The polyester elastane blend is lighter weight than the premium options, which makes the short feel quick to dry but also less durable across many events. For racers running one or two Spartans per year alongside gym training, the durability matches the budget price. Heavy-use racers should plan to retire the short after a season.
The built-in liner is functional rather than refined, with mesh that holds up well but feels less premium than Path Projects. Sizing runs slightly large compared to athletic brand norms, so consider sizing down if you fall between two options. Color and graphic options run broader than the technical alternatives.
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Reebok Sandstone Compression - Verdict
Reebok carries CrossFit roots in its training apparel, and the Sandstone Compression short brings that durability focus to obstacle racing. The Speedwick fabric is heavier than the running-focused options, which trades a small amount of dry time for significantly better resistance to abrasion at the knee and hip during crawls and ground-contact obstacles.
The eight-inch inseam splits the difference between the short and long options well. The hem stays put against the leg without rolling up during burpees, which is a common failure point on cheaper shorts. There is no liner, so pair with a separate brief for full coverage.
Durability is the strongest selling point. Reebok Sandstone shorts routinely survive a full season of races and training without losing compression or shape. Pricing sits in the mid-range, and the shorts are widely available across mass retail channels, which makes replacement easy if you damage a pair on the course.
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Path Projects Torrey CL - Verdict
The Torrey CL is the Path Projects answer for racers who compete in heat. The cool-touch knit fabric runs noticeably lower in surface temperature against the skin than standard polyester, which matters during summer Beasts and desert venues where heat management becomes a performance limiter.
The seven-inch inseam favors mobility and quick drying. The integrated liner uses the same soft mesh as the Sykes PX, which is one of the few liners in the category that does not chafe under repeated wet-dry transitions. Flat-locked seams and a wide flat waistband match the construction quality of the Sykes.
Sizing runs true to the Path Projects chart. The cool-touch fabric is slightly more delicate than the Sykes recycled poly, so handle the shorts gently in the wash and avoid abrasive surfaces during storage. For racers who target summer events, the temperature advantage is meaningful enough to justify owning a dedicated hot-weather pair.
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How to Choose
Start with race distance and climate. Sprint and Super racers in cool weather can run any of the five options. Beast and Ultra racers benefit from the longer inseams and firmer compression of the Path Projects Sykes PX or 2XU MCS. Summer racers should prioritize quick-drying fabric and shorter inseams.
Decide on the liner question early. A built-in liner reduces layer count and chafe risk for the majority of racers. A separate brief offers more customization and is preferred by athletes who already train in 2XU or Reebok-style unlined compression.
Match durability to volume. If you race two events per year, a mid-tier short like the Tough Mudder model carries the workload at a friendly price. If you race six or more events per year and train in the same shorts, the higher purchase price of Path Projects or 2XU pays back through longer useful life.
For more obstacle racing decisions, see our guide to compression shorts for marathon running and our overview of compression shorts for recovery. Our full evaluation process is documented on the methodology page.
Frequently asked questions
Why wear compression shorts under Spartan Race trail shorts?+
Compression shorts solve two problems at once on Spartan courses. First, they reduce chafing between the thighs over long distances where running shorts ride up and wet fabric rubs raw. Second, they keep glute and adductor muscles supported through the constant transition between running, jumping, crawling, and carrying. Most experienced racers wear a compression base under a lightweight trail short, which gives them modesty if the outer short tears on barbed wire while preserving the muscle support and anti-chafe layer underneath.
Will compression shorts shrink or warp after racing through mud and water?+
Quality compression shorts from athletic technical brands resist shrinkage well, but mud-and-cold-water exposure does shorten useful life compared to gym use. Polyester and elastane blends hold shape better than nylon when repeatedly soaked and dried. Rinse the shorts in cold water immediately after the race to remove grit, hand-wash with a mild detergent, and air-dry away from direct sun. Avoid the dryer entirely. Treated this way, a good pair survives six to ten obstacle course races before the compression fades.
How tight should compression shorts feel for an obstacle course race?+
Race-day fit should be snug enough to stay locked during a wet rope climb but not so tight that they restrict deep squats or burpees. A reliable test is to do twenty air squats and ten burpees in the changing room. If the waistband rolls down, the shorts are too loose. If the hem digs into the quad or you feel pressure on the groin during the bottom of the squat, size up. Most racers wear the same size they wear for running, not the size used for powerlifting.
Should men wear a compression short with a built-in liner or a separate jock?+
Built-in liners work well for the majority of Spartan distances up to a Beast, because they reduce the number of layers that can shift, twist, or chafe during obstacle transitions. A separate jock adds bulk and another seam that can rub when wet. Racers who prefer a removable cup for contact obstacles sometimes choose a compression short with a cup pocket, but full cups are unusual outside of contact sports. For most courses, a single-layer compression short with an integrated liner gives the cleanest fit.
Do compression shorts help with cramping during long obstacle races?+
The research on compression and cramping is mixed. Compression reduces muscle vibration, which can delay the onset of fatigue in the quads and adductors, but it does not prevent the electrolyte and hydration deficits that drive most race cramps. Treat compression shorts as one piece of a broader strategy that includes sodium intake, training volume, and pacing. If you cramp consistently in the same muscle group, a compression short with targeted support in that area may help, but it will not replace proper fueling and conditioning.
Morgan Davis
Morgan Davis writes for The Tested Hub.