100% made of acrylic yarn, the fabric is very soft, comfortable, warm. Since the neckline and hem thread weaving, making this sweater windproof and warm. This sweater has a slight elasticity, it is suitable for autumn and winter wear. Cool three layer wavy skirt design and stylish style, this is a great gift for your puppy. <p>Please measure length,neck,and chest of your pet, It is better to choose the sweater size based on the chest of your pet,The measurement chart is as following:</p> <p>XS(X-Small): Length 8.7" - Neck 7.9" - Chest 12.2""</p> <p>S(Small): Length 10.2" - Neck 10.7" - Chest 13.0"</p> <p>M(Medium): Length 12.2" - Neck 13.0" - Chest 14.6"</p> <p>L(Large): Length 15.4" - Neck 15.0" - Chest 19.3"</p>