A drag suit is a loose-fitting swimsuit worn over a regular competition suit during training to create extra resistance in the water. By forcing swimmers to work harder against the drag, these suits build strength and power that translate into faster times when the suit comes off on race day. They’re one of the most common and affordable training tools in competitive swimming, used at every level from age-group teams to Olympic programs.
How Drag Suits Work
Water is roughly 800 times denser than air, so even small changes in a swimmer’s profile create significant resistance. A drag suit works by disrupting the streamlined shape of the body. The loose mesh fabric catches water, and the baggier fit creates pockets where water pools and pulls against forward motion. This forces your muscles to generate more force with every stroke and kick just to maintain your normal training pace.
The effect is similar to running with a weighted vest or cycling into a headwind. Your cardiovascular system works harder, your stroke-specific muscles recruit more fibers, and your body adapts to producing power under load. When you switch back to a tight competition suit, that same effort propels you through the water noticeably faster. Swimmers often describe the sensation as feeling “light” or “free” during their first practice without the drag suit after a training block.
What They Look Like
Drag suits don’t look like regular swimwear. Most are made from a porous mesh or loosely woven polyester that lets some water through while still catching enough to create resistance. They come in a few common styles:
- Mesh briefs or jammers: The most traditional option. These fit like a regular suit but are cut larger and made from open-weave fabric. Briefs are more common for male swimmers, while jammer-length versions extend to the knee.
- Shorts-style suits: Slightly longer than briefs, these hang looser around the thighs and create more drag. Some have an adjustable drawstring to keep them from slipping off during flip turns.
- Layered suits: Some swimmers simply wear an old, stretched-out practice suit over their regular one. This DIY approach creates moderate drag without buying a dedicated suit.
Most drag suits cost between $15 and $40, making them far cheaper than other resistance training tools like parachutes or resistance bands. They’re lightweight, easy to pack, and don’t require any setup at the pool.
Training Benefits
The primary benefit is building sport-specific strength. Unlike weight room exercises that isolate muscles in patterns different from swimming, a drag suit loads the exact muscles you use in your stroke while you’re actually swimming. Your lats, shoulders, core, and hip flexors all work harder in the positions and sequences they’ll need on race day.
Drag suits also improve cardiovascular conditioning. Swimming at your usual pace with added resistance elevates your heart rate, turning a moderate aerobic set into a more intense effort. Over weeks of training, this raises your aerobic threshold, meaning you can sustain faster speeds before fatigue sets in. Coaches frequently program drag suit sets during base-building phases of the season when the goal is developing a deep fitness foundation.
There’s a neuromuscular component as well. Training against resistance forces you to maintain proper technique under fatigue. Swimmers who let their stroke fall apart in a drag suit quickly feel how much slower they get, which reinforces efficient mechanics. The added resistance also encourages a higher stroke rate and more powerful catch phase, since a lazy pull simply won’t move you forward.
When Swimmers Use Them
Drag suits are almost exclusively a practice tool. You’ll never see one at a competition. Most coaches incorporate them during specific portions of a workout rather than for the entire session. A typical approach might involve wearing the drag suit for the main set (the hardest, highest-volume part of practice) and then removing it for warm-up, cool-down, and speed work.
The timing within a season matters too. Drag suits appear most frequently during the early and middle parts of a training cycle when volume is high and the focus is on building fitness. As a championship meet approaches, coaches taper the workload and remove resistance tools so the body can recover and convert that built-up strength into speed. Some programs pull drag suits out of rotation two to four weeks before a major competition.
Age-group coaches tend to introduce drag suits gradually, often starting with older teenagers who have established solid technique. Adding resistance too early, before a young swimmer has consistent mechanics, can reinforce bad habits rather than build useful strength.
Drag Suits vs. Other Resistance Tools
Drag suits aren’t the only way to add resistance in the water, but they’re the most convenient. Swim parachutes, which are small chutes that attach to a belt and trail behind the swimmer, create more resistance and allow for adjustable levels of drag. However, they can interfere with other swimmers in a crowded lane and require setup time. Power towers and resistance cords tether a swimmer to a fixed point with elastic bands, providing progressive resistance but limiting you to one spot in the pool.
Paddles are another common resistance tool, but they target the upper body specifically and change hand position, which can stress the shoulders if overused. Drag suits distribute the extra load across the entire body, making them gentler on any single joint. Many swimmers use a combination of tools throughout a season, with drag suits serving as the everyday baseline and more specialized equipment brought in for targeted sessions.
Choosing the Right Amount of Drag
More resistance isn’t always better. A suit that creates too much drag will slow you down so much that your stroke mechanics break down, defeating the purpose. The goal is enough resistance to challenge your muscles while still allowing you to swim with proper form and reasonable pace.
Most swimmers start with a single mesh suit in a size close to their normal fit. If you want more resistance, you can size up for a baggier fit or layer a second suit on top. Some manufacturers sell suits with pockets or panels specifically designed to trap more water, giving you a higher drag option without needing multiple layers. The right amount varies by swimmer. A distance freestyler doing long aerobic sets may want moderate drag to sustain the effort, while a sprinter doing short power sets might tolerate a heavier suit for brief intervals.
Pay attention to how the suit feels during flip turns and push-offs. A suit that’s too loose can slide down or bunch up, creating discomfort and disrupting your streamline off the wall. A secure waistband and a fit that stays in place during explosive movements will save you frustration over a long practice.