BikeRunSki try Jack Wills. If I were computer literate I could give you a link, but they're cotton, bright coloured spots or stripes and have elastic "waist" bands (they're bikini style, so "hip" band might be more accurate). Tres comfy and £12.50 a pair.
The gold ones make me think of going to a fancy dress party as Wonderwoman, but I think hers were red - shame they don't do them in a range of colours!