Skate and surfwear company Pacific Sunwear of California has rejected a US$4.50 per share bid from extreme sports company Adrenalina.

In a brief statement, PacSun said the "unsolicited proposal" to buy all issued and outstanding shares in Pacific Sunwear "is not in the best interests of the company's shareholders".

Adrenalina submitted its proposal to the PacSun board earlier this week, claiming that PacSun CEO Sally Frame Kasaks had "repeatedly declined" earlier attempts to enter into discussions about a possible acquisition.

The $4.50 per share offer would consist of a combination of cash and Adrenalina common stock, representing a premium of 24% above PacSun's closing price at the end of last week.

PacSun posted second quarter profits of $3.7m, 60% down on last year, as sales in its core California stores slowed.