Adjustable Breathable Multifunction Oxford Pet Dog Backpack Quick Release Saddle Bag Outdoor Carrier Travel Hiking Camping (S/M/L Size) (red, L) Neck circumference is adjustable. Suitable for Siberian Huskies and such size dogs perfectly for outdoor training. The PU mesh in the middle is breathable and cooling, bring your loved dog comfortable feelings. The bag inner have sandwich air net, very comfortable. Ergonomic padded spine support contours to the dog's back