Sprouts are one of Haimu's full-length D-shape bumps, starting immediately at the top and traveling all the way to the bottom-out. It's a unique feeling with very few peers, with only the Gateron Type R (heavier) and Bsun Ocean (softer bottom-out thanks to a hint of linear post travel) featuring a similar feel.
Bright and clacky, these are a lot of fun to type on, giving a distinct almost typewriter feel at speed.
There are some reports of chatter with the Sprouts, however, including mine; as this is a complaint mirrored by Type Rs, I wonder if there's something in the way these full-bump tactiles actuate that disagrees with certain boards. I also found the light spring had issues rebounding in one of my spacebars, but I was able to resolve that by cleaning the stabilizers and reapplying only a tiny layer of lube. With these issues in mind, you may want to sample them before investing in a full set; if they work with your set-up, you'll find them unique and a lot of fun.
Purchased in packs of 35, nice packaging, beautifully fleuro green switches inside! As with POM housings I was expecting clacky, and these are certainly clacky (in my board at least).