assistant: Black toenails usually signal either too-tight toe box or excessive downhill running, so a roomier fit is the right move. Good news: several shoes in my data explicitly fit wide forefoot and are built for daily training. **Nike Vomero Premium** is your safest bet here. It's marked wide in the forefoot, has a 54/44mm stack (maximal cushion) that absorbs impact well, and the ZoomX midsole is plush enough to reduce the pounding that can aggravate toenail issues on longer runs. It's technically categorized as easy recovery, but it's roomy and durable enough for daily training miles. At $220, it's a premium pick but worth it if toe comfort is the priority. **Saucony Guide v18** is the budget-conscious alternative—also wide forefoot, high cushioning, and a true daily trainer. At $140, it's $80 cheaper than the Vomero and still delivers solid protection. The 6.0mm drop is lower than the Vomero's 10mm, which some runners find more natural, though both will work fine for your feet. **Brooks Glycerin GTS v22** rounds out the options. It's wide-friendly (though Doctors of Running notes the standard version runs slightly snug—the wide version is the move for you), has excellent lockdown to prevent slipping, and mild stability if you have any overpronation tendency. The DNA Tuned midsole is firmer than the Vomero but still well-cushioned. One quick question: are you currently wearing shoes that are too tight in the toe box, or is this a new issue? That'll help me gauge whether you need maximum room or just a step up from what you're in now.