Compression gear is elastic, snug-fitting clothing engineered to apply consistent pressure to your body. It comes in many forms, from knee-high socks and calf sleeves to full-length tights and upper-body shirts, and it’s used by athletes chasing faster recovery, patients managing chronic swelling, and everyday gym-goers who like the supported feel. The pressure these garments apply ranges from light (around 10 mmHg) to medical-grade (30+ mmHg), depending on the product and its intended use.
How Compression Gear Works
The basic idea is mechanical: the garment squeezes your tissue from the outside, which raises the pressure around your blood vessels and lymphatic channels. This external squeeze narrows your veins slightly, which speeds up the flow of blood back toward your heart. Faster venous return means metabolic waste products, including damaged muscle proteins, get cleared from your working muscles more efficiently.
There’s also a reflex component. When the garment compresses tissue around your small arteries, it reduces the pressure difference across those vessel walls. Your body responds by widening those arteries, a process called vasodilation, which lowers resistance to blood flow and ultimately increases circulation to the compressed area. At the same time, compression reduces how much fluid leaks from your capillaries into surrounding tissue, which helps limit swelling.
Common Types of Compression Gear
Compression garments are designed for specific body parts, and each type serves a slightly different purpose:
- Compression socks and stockings are the most widely used type. They apply graduated pressure, strongest at the ankle and gradually decreasing up the leg, to push blood upward against gravity. These range from athletic versions worn during runs to medical-grade stockings prescribed for chronic venous disease.
- Calf sleeves cover only the lower leg, leaving the foot free. Runners and basketball players often wear them for calf support without changing their shoe fit.
- Compression tights and leggings cover the full leg and sometimes extend to the waist. They’re popular for recovery after heavy lower-body workouts.
- Upper-body shirts and arm sleeves are less common but used in sports like basketball, baseball, and cycling. Arm sleeves also have medical applications for managing swelling after breast cancer surgery.
- Full-body suits, gloves, and face masks are primarily medical devices used for burn scar management and severe lymphedema.
What the Fabric Is Made Of
Most compression gear is built from a blend of nylon and spandex (also called elastane or Lycra). Nylon provides the structure: it’s strong, lightweight, and resistant to wear and tear. Spandex provides the stretch and snap-back that creates compression. The ratio matters. Higher spandex content means more stretch and a closer fit, while lower spandex content offers more durability and firmer support.
This nylon-spandex blend also wicks moisture away from skin and dries quickly, which is why compression gear feels less clammy than cotton during exercise. Some brands add antimicrobial treatments or mesh ventilation panels, but the core performance comes from the fiber blend itself.
Does It Actually Improve Performance?
If you’re hoping compression tights will make you faster, the evidence is disappointing. A 2025 systematic review and meta-analysis in the Journal of Sport and Health Science pooled data from multiple randomized controlled trials and found no significant improvement in race time, time to exhaustion, running speed, or oxygen uptake when runners wore compression garments. The effect sizes were essentially zero across all performance measures. This held true regardless of the runners’ ability level or the type of running event.
So compression gear won’t give you a competitive edge during the activity itself. Where it shows more promise is in what happens afterward.
Recovery Benefits After Exercise
The recovery picture is more encouraging, particularly for strength. A meta-analysis in Sports Medicine found that wearing compression garments after exercise produced large benefits for strength recovery between 2 and 8 hours post-workout, and those benefits remained significant beyond 24 hours. The effect was most pronounced after resistance exercise like weightlifting, where recovery at the 24-hour mark and beyond showed the strongest gains. Cycling performance the next day also improved meaningfully when athletes wore compression during recovery.
The evidence on muscle soreness is mixed but leans positive. When compression garments were worn during recovery (not just during exercise), soreness after strenuous workouts was reduced in multiple studies, particularly after resistance training. Wearing compression only during the exercise itself was less consistently helpful for soreness. Blood markers of recovery showed a similar split: lactate levels tended to drop faster with compression, though other markers of muscle damage didn’t change consistently.
The practical takeaway is that compression gear appears most useful as a recovery tool. Wearing it for several hours after a hard workout, or even overnight, is where the clearest benefits emerge.
Medical Uses for Compression
Compression garments have a much longer history in medicine than in athletics, and the evidence there is more established. Two of the primary conditions treated with compression are lymphedema and chronic venous insufficiency, which together affect millions of people and require ongoing management.
In lymphedema, fluid accumulates in tissue because the lymphatic system can’t drain it properly. Compression garments provide static pressure that opens tiny lymphatic capillaries, allowing trapped fluid to enter and move through the drainage system toward lymph nodes. For chronic venous insufficiency, where damaged valves let blood pool in the legs, graduated compression stockings support the calf muscle’s natural pumping action to push blood back toward the heart.
Compression is also used to prevent postthrombotic syndrome after a deep vein blood clot. This condition develops in 20% to 50% of people who’ve had deep vein thrombosis and can cause symptoms ranging from pain and swelling to skin breakdown and recurring leg ulcers. Medical guidelines favor routine compression garment use to slow the progression of both lymphedema and chronic venous insufficiency.
Getting the Right Fit
Compression gear only works if it fits correctly. Too loose and you lose the pressure gradient. Too tight and you risk cutting off circulation or creating uncomfortable pressure points. For lower-body garments, you’ll need several measurements:
- Ankle circumference: measured at the narrowest point, just above the ankle bone.
- Calf circumference: measured at the widest point, roughly halfway between your knee and ankle. If your calf tapers gradually, take two measurements at different points.
- Leg length: measured while seated with your knee bent at 90 degrees, from the floor along the inside of your leg to the crease behind your knee.
- Thigh circumference (for thigh-highs or tights): measured at the widest part of your thigh, a few inches below the groin. If your legs differ in size, use the larger measurement.
Athletic compression gear typically uses standard small-through-extra-large sizing, which is less precise than medical-grade garments. If you’re buying compression for a medical condition, custom sizing based on exact measurements gives far better results.
Who Should Avoid Compression Gear
Compression gear is safe for most people, but certain conditions make it risky. Severe peripheral artery disease is the most important contraindication. When arteries in the legs are already narrowed and struggling to deliver blood, adding external compression can further restrict flow and damage tissue. An international consensus statement identifies severely reduced blood flow to the feet as a clear reason to avoid compression.
People with advanced heart failure should also avoid compression, because pushing more fluid from the legs back into circulation can overload an already strained heart. Severe diabetic nerve damage is another concern: if you can’t feel pressure or pain in your legs, you won’t notice if a garment is too tight, which raises the risk of skin injury. And as with any garment worn against the skin for extended periods, a confirmed allergy to the fabric materials is a straightforward reason to avoid them.
If you have any of these conditions, compression decisions should be made with a clinician who can assess your circulation. For healthy people using athletic compression gear, the risks are minimal as long as the fit is correct and you’re not wearing garments so tight they leave deep indentations or cause numbness.