The material of the outside cloth of this pet sling carrier bag is composed of Oxford cloth, together with 100% Pure Cotton Inner of polyester lining, these two kinds of fabrics can provide you with a comfortable wearing experience as it has some outstanding features, like strong, tough, durable and breathable. There is an adjustable strap of this pet sling carrier that can be adjusted to 23", you can easily change the length of the strap to make your dog feel comfy. In consequence, it can fit different sizes of the dogs. Additionally, another safety strap can keep your pets safe and prevent them from jumping out of the carrier bag by accident. This kind of pet sling carrier is designed to be lightweight due to its soft and light materials. In this way, you can take your pets out for outdoor activities, like travelling, shopping ,adventure tour etc. and you won’t feel tired or even exhausted after carrying the pets for a long time with this portable and convenient bag.