What is the fine-grained topic of the following text: The Defender four-way stretch fabric allows the jacket to mirror the body’s movements, while maintaining the highest level of waterproofness and breathability, and the Primaloft Eco insulation, body mapped at three different weights throughout the body, offers an excellent warmth to weight ratio. Only return the topic.
Features of a waterproof and breathable jacket with Primaloft Eco insulation