Material - Dog vests made of 95% polyester 5% spande, soft lightweight breathable and more flexible, anxiety vests fasten with velcro closure. easy to put on/off, It is also elastic, which allows continuous mild pressure, relieving stress as well as anxiety. wearing this anxiety shirt is just like having the owner hugging it. Adjustable Design for A Snug Fit - Dog anxiety vests needs to fit your dog tightly thats will be calming and soothing for your pet, our dog vests design with double compression, adjustable stretching belting wrap dogs body, at the same time, straps that stick well and stay in place to provide constant pressure,according to different body shapes adjustment size , dont worry size issue. Anti Anxiety Jacket for Large Small Medium Dogs - our dog anxiety vest is a wearable vest-like garment that wraps around your dog’s body like a warm hug that pressure on the torso creates a calming effec，It has helped with her fear and anxiety when thunder or storms are near, suit for thunderstorms,Fireworks,Thunder, Travel, Separation,loud noises, etc it will keep your dog mentally in a safe space.