Spine protectors are great if you're going to the park or snowboarding in place with tree and rocks. On just a slope, spine compression injuries are more common and getting something like this: https://smile.amazon.com/Soared-Protection-Protective-Skating-Snowboard/dp/B01EUISTG4 that will protect your butt and prevent spine compression if you fall is more useful.
Of course if you can get both, that's even better. But I typically recommend protective shorts as the second most important piece of safety gear after the helmet.
Soared 3D Protection Hip Butt EVA Paded Short Pants Protective Gear Guard Impact Pad Ski Ice Skating Snowboard Black https://www.amazon.com/dp/B01EUISTG4/ref=cm_sw_r_cp_api_glt_i_8J639DMG01AZ9CAD5ZNM?_encoding=UTF8&psc=1