Denim giant Levi Strauss & Co has proposed the closure of its Spanish sewing plants at Bonmati and Olvega, bringing about a possible loss of 453 jobs.

The United States-based company, which has begun discussions with employee representatives on the proposed shutdowns, said it would seek to reach an agreement with workers before beginning the required legal process.

The move is part of the company's ongoing strategy to improve competitiveness, reduce costs and achieve long-term financial goals.

"We have looked long and hard for alternative solutions, but we simply can't continue to bear manufacturing costs in Spain that are double those of our other plants in Eastern Europe," Levi Strauss Europe's senior director of manufacturing operations Domenico Trizio said.

"Today's proposal has been an extremely tough decision to reach, but we must become more responsive to the needs of the marketplace.

"In keeping with our established tradition of responsible business practices, we intend to do everything we can to cushion the impact of the proposed closure on our employees and the community."

While the plants are expected to cease operation at the end of the current third quarter, the company will continue to operation a distribution centre and sales office in Barcelona.

Levi's is the biggest selling jeans brand in Spain.