Eye Micro UB-150 Rollerball Pens - Black, Pack of 5

solid daily driver pen. smooth and consistent ink. i'm also liable to leave pens in my various kits for months at a time so i had to switch to capped pens. i purchased this 5-pack almost a year ago in March 2025 and the two pens I still haven't lost write as well as they did on day one.

Pens are easy flow ball point and great when using w watercolors Nice fine line that is smooth

Pen of the Century

Great pens at a good price. Perfect for writing, journaling, art projects. Smooth and clean lines. Give them a minute to dry so they don't smudge.

Great pens for sketching. They’re not stingy on ink while I’m drawing, so I can write fast.

Listen, when you're packing your GoBag, every ounce and every dollar counts. You don't throw in junk that might fail when the chips are down. This little Uni-ball Eye Micro isn't some fancy office toy—it's built like a tank for the kind of writing that has to survive rain, sweat, spilled coffee, or whatever else life throws at it. I've tested these things hard: dunked 'em in water, wiped 'em with alcohol, even rubbed mineral oil across the page. The ink doesn't budge. It soaks right into the fibers of the paper and locks in like it owns the place. That's why I rate this as a solid GoBag essential. What Makes It Worth the Space in Your Bag • Ink that's legitimately permanent. Once it dries, good luck trying to smear, wash, or scratch it off. This is the stuff you want for labels on gear, emergency notes, maps, or any record you might need to pull out months later in rough shape. • That stainless steel clip? Real metal, not cheap pot metal. Slides into a pocket or strap without drama and stays put—no losing it when you're moving fast. • Ink window right there so you can glance and know if you're running low before you're stuck without a way to mark something critical. Where It Falls Short (Because Nothing's Perfect, and Honesty Saves Lives) • On thin paper it bleeds a bit—don't expect to write on both sides of notebook pages without ghosting through. • Lines get a touch fuzzy on really porous stuff compared to a ballpoint. You're trading razor-crisp for bombproof permanence. • Dry time is 5-10 seconds while the ink soaks in. Patience is required; don't smear it right after writing. • On slick, non-porous surfaces (think glossy labels or plastic bags), it stays wet longer and can reflect light weirdly until it finally sets. • The tip is delicate. Drop it point-down even once and it's game over—the ball gets knocked out of alignment. Cap it religiously, treat it like the fragile precision tool it is. When This Pen Earns Its Keep Best for permanent, no-BS marking on cardboard boxes, thick notepads, manila envelopes, or any porous surface where you need writing to last through hell and high water. It's archival-grade—fade-resistant, waterproof, acid-free—so your notes don't disappear when you need them most. Think labeling supply caches, writing instructions that have to hold up outdoors, or jotting details you can't afford to lose. Skip it for everyday handwriting, tiny precise notes, writing in actual pouring rain (paper has to be dry first), or anything needing super-fine crisp letters. And for the love of everything, don't use it for fancy journaling—this is survival gear, not calligraphy. Bottom line: If your GoBag has room for only one blue pen that absolutely has to work when everything else goes sideways, make it this one. It does exactly what it promises—hardcore, dependable writing that laughs at water and wear. Just baby that tip and keep it capped. Solid 4 out of 5 stars. Worth every penny for the peace of mind. Grab the 5-pack; you'll thank yourself later when the others have dried up or broken and this one's still going strong.

These are my favorite waterproof pens for using with watercolor paintings.

Great, inexpensive pens for art!