Check the listing for details. Black Diamond Primrose Sit Harness Size: XS Extra SMALL - Blue. Condition: Used. Listed at 19.96 USD. The Black Diamond Primrose Sit Harness in XS Extra SMALL size is a high-quality harness designed specifically for outdoor sports enthusiasts, particularly climbers and cavers. With a sleek blue color, this harness is durable and comfortable to use. The Black Diamond brand is known for its reliable gear, making this harness a valuable addition to any adventurer's equipment collection. Perfect for tackling challenging terrains and vertical surfaces, this harness provides the necessary support and safety features for a successful outdoor experience.