An arch style traction kite which includes a wing or wing envelope which has a leading edge which, when viewed in plan with the wing or envelope laid in a horizontal plane, is concave in a centre section of the wing or envelope and straight or convex in plan near the tips of the wing. The concave leading edge feature can be incorporated in any arch style traction kite such as ram air inflated kites, single skin pneumatic tube framed kites and bridleless ram air inflated kites with flexible leading edge rods or in kites incorporating a combination of the features of such kites.