DVT prevention

General health information only. Consult your GP or travel medicine clinic for personalised DVT risk assessment before long-haul travel.

DVT prevention for long-haul travellers is one of the most evidence-backed areas of travel health. Graduated compression socks — the primary product in this range — have been shown in multiple clinical studies to significantly reduce the incidence of deep vein thrombosis (DVT) and lower-leg swelling in long-haul air travellers. For Australian travellers covering 15–22 hours to Europe and North America, or repeated 7–8 hour legs through Southeast Asia, compression socks are a standard recommendation from travel medicine specialists.

At Travel Gear, we stock DVT prevention products specifically chosen for travel use — compression socks in medically appropriate graduated compression levels, comfortable enough for a 22-hour flight and practical enough to wear in the airport, on the bus, and during transit days. Read our detailed guide on DVT on long-haul flights for the full picture on risk, prevention, and when to see a doctor.

How Graduated Compression Socks Prevent DVT

Graduated compression socks apply pressure that is firmest at the ankle and progressively reduces up the calf — a pressure gradient that actively promotes venous return (blood flow from the legs back to the heart). During prolonged sitting, the calf muscles that normally pump blood upward are largely inactive. Blood pools in the lower legs. Graduated compression counteracts this pooling effect, maintaining circulation even during extended immobility.

A Cochrane systematic review — the gold standard of medical evidence synthesis — found that passengers wearing graduated compression stockings on long-haul flights had significantly fewer cases of symptomless DVT than those who did not wear them. This is among the strongest evidence bases for any over-the-counter travel health product.

Choosing the Right Compression Level

Compression socks are rated in mmHg (millimetres of mercury), indicating the pressure at the ankle:

• 15–20 mmHg (Class 1 / Mild compression): Recommended for healthy travellers on long-haul flights as a preventive measure. Comfortable for all-day wear without medical supervision. Suitable for most travellers without existing circulatory conditions.
• 20–30 mmHg (Class 2 / Moderate compression): Recommended for travellers with varicose veins, a history of leg swelling, pregnancy (with GP approval), or those with multiple DVT risk factors. Consult your GP before using this level if you have any circulatory health conditions.
• 30–40 mmHg (Class 3 / Firm compression): Medical-grade compression for diagnosed circulatory conditions. Requires a prescription in Australia. Not available in our retail range — see your GP.

For the majority of healthy Australian travellers on long-haul flights, 15–20 mmHg graduated compression socks provide appropriate preventive benefit without requiring medical supervision.

When to Put Compression Socks On

This is the most common mistake our customers make: putting compression socks on after several hours of sitting on a plane. The preventive effect works best when blood circulation is normal. Put compression socks on before you board — at home or in the airport terminal. Wear them throughout the flight and for a few hours after landing, particularly if you're sitting in a car or bus after the flight.

Compression socks are one layer of a complete travel health system. Combine with: getting up and walking every 60–90 minutes, drinking 250ml of water per hour, and performing seated calf exercises during extended periods with the seatbelt sign on. See our complete guide on preventing DVT on long-haul flights for the full evidence-based protocol.

For your complete travel health kit, also explore our travel first aid kits and mosquito protection range.

Frequently Asked Questions

Do compression socks really work for flying?

Yes — the evidence is strong. A Cochrane Review of randomised controlled trials found that graduated compression stockings significantly reduced the incidence of symptomless DVT in long-haul air travellers and also reduced lower-leg swelling and discomfort. They are consistently recommended by travel medicine specialists for flights over 4 hours, with stronger recommendations for flights over 8 hours and for travellers with additional risk factors.

How long should I wear compression socks on a flight?

Put them on before boarding and wear them throughout the flight. Keep them on for 2–3 hours after landing, particularly during ground transport (taxi, bus, train) after the flight. Remove them once you're moving around freely at your destination. For very long flights (15+ hours), change to a fresh pair at a connection point if possible.

Can anyone wear compression socks?

Compression socks at 15–20 mmHg are safe for most healthy adults without existing circulatory conditions. Do not use compression socks if you have: peripheral arterial disease, severe arterial insufficiency, significant peripheral neuropathy, or uncontrolled congestive heart failure. If you have any existing leg or circulatory health conditions, consult your GP before using compression socks for travel.