What is a kitesurfing kite and what is it made of

A kitesurfing kite is a large fabric wing that flies on lines and pulls you across the water. An inflatable kite gets its shape from air-filled tubes along the leading edge and struts, and it is built to be relaunched from the water.

Two main constructions: inflatable (LEI) and foil

An inflatable kite, often called LEI for leading edge inflatable, is a single-skin wing with inflatable bladders that give it shape. The inflated bladders keep it floating, so it can lie on the water and be relaunched, because unlike a foil kite it has no cells that would fill with water. LEI kites are the most popular choice for the water thanks to quick and direct response, easy relaunch and durability.

A foil kite is fabric with air cells and a fixed bridle, built like a paraglider. It does not need a pump, and closed-cell versions have valves that hold the air, so relaunch is possible; open-cell foils cannot be relaunched after a fall on the water. Foil kites suit light wind and long hangtime, and they are used for racing, hydrofoiling, snowkiting and powerkiting.

If you are deciding between the two, the comparison in foil kites vs inflatables goes deeper, and the overview of kite types covers how the designs are used.

Parts of an inflatable kite

Every inflatable kite is built from the same set of components. Knowing the names helps when you read a manual, check your gear before a session or buy a used kite.

The bar, trim strap and safety line are separate from the kite itself; the kite bar and lines guide explains how they connect to the bridle and pigtails.

What a kite is sewn from

The canopy is usually made of light rip-stop polyester around 54 g/m². The leading edge, struts and reinforced areas use heavier Dacron fabric around 150 g/m². The coating on these fabrics blocks wind from passing through and protects against UV, which is why an old kite becomes less effective as the coating fades.

Inside the structure sit airtight polyurethane bladders with valves. Some kites also carry fibreglass battens. The bridle and pigtails are made of high-modulus polyethylene such as Dyneema or Spectra, and they may include pulleys.

Building a kite takes 20-40 hours depending on complexity. Bladders are tested after welding, and a finished kite is inflated and left for about an hour to confirm it holds air.

Kite shape: C, delta, bow/SLE, hybrid

Kite shapes differ in how much power they deliver, how much they can be depowered and how easily they relaunch. The C-shape is the oldest design: punchy power, stable in jumps and fast turning, but with a smaller wind range, less depower and a harder relaunch from the water. It suits intermediate to advanced riders, and a fifth line makes relaunch easier.

Bow and SLE (supported leading edge) kites offer the largest depower and the widest wind range, with a flat aerodynamic shape that is easy to control in any bar position and easy to relaunch. Their key safety feature is that releasing the bar depowers the kite, which makes them suitable for all levels. Hybrid and delta kites have a bridle supporting the leading edge, like bow kites. A delta has a more triangular shape with more area in the middle, which gives it more power. ARC is a C-shaped foil without a bridle with a softer feel.

Aspect ratio matters too: high aspect kites fly faster, point closer to the wind and glide well in jumps, while lower aspect kites are easier to control, relaunch quickly and stay stable in gusts.

Kite size in m²

LEI kites are most often 5-18 m². Across all types, kites range from 0.7 to 21 m². A larger area gives more power, and most riders need one to three kites in the 7-12 m² range to cover different wind strengths.

Choosing the right size depends on your weight, the wind and your level. The kite size guide explains the logic, and the kite size calculator gives you a starting number for the conditions you expect.

More area, more power

Care and repairs

Do not overinflate the bladders: it increases stress on the fabric and, in heat, a bladder can burst. Do not leave the kite flapping in the wind, because it damages the rip-stop coating; deflate and pack it after a session. Keep it away from sharp surfaces, and remember that shore break and hard crashes damage the seams.

Never store a kite wet. Dry it if you can; if you cannot, leaving it wet with salt water is better than rinsing it with fresh water, which risks mould. Do not brush sand off, rinse it with water or shake it off dry. UV can break down the fabric's integrity in as little as 300 hours of direct sun.

A leaking bladder or a small tear in the canopy can be repaired: manufacturers such as Duotone sell spare bladders, valves, lines and repair patches. If you are shopping second-hand, the used gear guide covers what to inspect.

Where to go next

Matching a kite to your riding is covered in the kite types overview and the equipment guide. Unfamiliar words are explained in the kitesurfing glossary.