let initialJSONString = """
[
{
"id" : 1023,
"price" : "89.50",
"stock_quantity" : 7,
"virtual" : false,
"attributes" : [
{
"id" : 2,
"option" : "XL",
"name" : "Size"
},
{
"id" : 1,
"option" : "Black",
"name" : "Color"
}
],
"sale_price" : "",
"shipping_class_id" : 0
},
{
"id" : 1022,
"price" : "89.50",
"stock_quantity" : 7,
"virtual" : false,
"date_on_sale_to" : null,
"attributes" : [
{
"id" : 2,
"option" : "XL",
"name" : "Size"
},
{
"id" : 1,
"option" : "Virtual Pink/Black",
"name" : "Color"
}
],
"sale_price" : "",
"shipping_class_id" : 0
}
]
"""

struct Cloth: Codable {
    let id: Int
    let price: String
    let stockQuantity: Int
    let virtual: Bool
    let attributes: [Attributes]
    let salePrice: String
    let shippingClassId: Int

    struct Attributes: Codable {
        let id: Int
        let option: String //If you have limited values, you can use an enum String here
        let name: String
    }
}

func parseClothes() {
    let jsonData = initialJSONString.data(using: .utf8)!
    do {
        let decoder = JSONDecoder()
        decoder.keyDecodingStrategy = .convertFromSnakeCase
        let clothes = try decoder.decode([Cloth].self, from: jsonData)

        print(clothes)

        let filtered = clothes.filter { aCloth in
            let attributes = aCloth.attributes
            return attributes.contains { $0.name == "Color" && $0.option == "Black" }
                && attributes.contains { $0.name == "Size" && $0.option == "XL" }
        }
        print(filtered)
    } catch {
        print("Error: \(error)")
    }
}

parseClothes()