High Quality Fabric - Environmentally friendly and durable, breathable material to make your pet feel free and safe.Keep your pet comfortable - Front windscreen for good ventilation and visibility. Adjustable padded straps contribute to relief, while extendable straps with buckle keep the backpack steady.Safe Pull Cord Design- Secure buckle inner can be attached to your dog's collar and the adjustable neck hole is designed to match your pet's neck circumference and prevent them from jumping out. 2 side pockets to store small things, free your hands. Perfect for cycling, travelling, shopping, hiking and other outdoor activities.DIMENSIONS - S - 11.81 x 13.7 x 5.51 inches / 30 x 35 x 14 cm (suitable for under 2 kg); M-- 13.7 x 15.7 x 6.7 inches / 35 x 40 x 17 cm (suitable for under 4 kg).Product descriptionSize Name:s | Colour Name:blueProduct description :1. This high quality good looking pet backpack helps you and your beloved pet to travel safer and more comfortable. You don't have to worry about losing your buddy or looking for them everywhere.2. It is perfect for a variety of extreme sports such as hiking, camping, shopping, cycling, mountain climbing, etc. Let your pet enjoy a relaxing walk and keep your hands free.3. Mesh window design: it is easier for your beloved pet to breathe and relax and enjoy the trip.4. Size reference - S - 11.81 x 13.7 x 5.51 inches / 30 x 35 x 14 cm (suitable for under 4.41 lbs / 2 kg); M - 13.7 x 15.7 x 6.7 inches / 35 x 40 x 17 cm (suitable for under 8.82 lbs / 4 kg).