RUFFWEAR Undercoat Water Dog Jacket - Insulated Amphibious Gear for Cold Water Swimming - Aurora Teal XX-Small - Perfect for Winter Water Activities & Outdoor Adventures

It fits maybe 5 inches longer than Ruffwear’s life jacket. I use it on my dog to keep her warmer when she goes in alpine lakes like Tahoe. She doesn’t shiver when playing in the water if she’s wearing it. Sizing is accurate if you use Ruffwears girth measurement chart. Make sure you measure the widest part of your dogs chest.Purchased to keep our dog warm under swim vest while swimming in Minnesota lake in late MayThis is a really nice coat; it is well made and provides some warmth. The front chest and leg area is great, snug around his body and the arm seals aren't too tight. However, the rear is a bit loose, allowing water inside. I should have looked for one with legs or straps to feed legs through, to keep it flat on his body. It is still warmer than not wearing anything and a good rash guard from his PFD.Dogs love wearing this undercoat. Keeps them warm and extends their time in the lake. I’ve been browsing for something form fitting, especially for the chest. Wonderful under their life jackets and will be great under their winter puffer coats on those wet, wintry days.Would definitely recommend. Snug fit going on, but not too difficult. Chest measurements were accurate for these two Jack Russells- size xxs - perfect fit!