Several yrs ago I bought a Filson chest protector for Kansas. Nearing 14 he's still got all the GSP spunk but doesn't fully appreciate ice and hockey pucks.
Take note of the strap along his back in the photo and how it can be used to lift him by supporting his chest - it's like carrying a suitcase and is great for ice (and senior dogs in particular).
Here's a link - they're ruggedly made as expected.
https://www.filsons.us/product/dog-c...-blaze-orange/