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Best double bass rosin — Bassment Summer and Winter arranged side by side

Professional Grade Double Bass Rosin

Push the limits.
Stay in control.

Summer / 70-90F Rooms Handmade by Isaac Trapkus Winter / 60-75F Rooms

Testimonials

Shared voluntarily and without any compensation.

This stuff works!
Timothy Cobb
Timothy Cobb Principal Bass, New York Philharmonic
As a lifelong Pops user, Summer feels very familiar. Great bite and grip in the string - super clean and articulate.
Timothy Dilenschneider
Timothy Dilenschneider Associate Principal Bass, Houston Symphony
For the first time, I feel like I get that spring/fall rosin punch during the coldest time of the year.
Glenn Gordon
Glenn Gordon Assistant Principal Bass, Oslo Philharmonic
Winter is the first rosin I've used that doesn't have issues with consistency... Summer's tone is pure and smooth, but still has strong grip on the front end.
Paul Nemeth
Paul Nemeth Associate Principal Bass, The Florida Orchestra
Handled Swiss winter with no problem, including an outdoor Christmas gig in the snow!
Orr Paradise
Orr Paradise Freelance Jazz Bassist
Bassment Summer double bass rosin — best bass rosin for warm rooms
Optimal Room Temp 70-90°F / 21-32°C

Summer

$52

Free shipping

1-year money-back guarantee
Catch Stronger initial catch than Winter.
Release Clean through the stroke. No gritty, gummy feel.
Good 5+ years Won't dry out or powder your bow.

Bassment Winter double bass rosin — best bass rosin for cold rooms
Optimal Room Temp 60-75°F / 16-24°C

Winter

$52

Free shipping

1-year money-back guarantee
Dynamic Gentle start on soft notes with punchy grab under pressure.
Versatile Works alone or as a base-layer boost.
Good 5+ years Won't dry out or powder your bow.

Checkout

If your country isn't listed, email bassmentrosin@gmail.com to order directly.

1-year money-back guarantee
The Story

Bassment Rosin

I’m Isaac Trapkus, a bassist in the New York Philharmonic.

Bassment Rosin grew out of my frustration with rosin and lifelong habit of starting overly complicated projects.

See how they play

Summer Stronger catch · clean release
Winter Responsive grab · Stable performance
Development
100+ Attempts

I started with a simple goal: make a bass rosin that felt consistent, lasted through the concert, and didn’t go bad. The hard part was balancing grip, release, temperature range, and long-term stability.

Two different
problems.

Winter and Summer are not simply softer and harder versions of the same idea. Each was built around a different failure point.

Cold / Dry

Winter

Easy and responsive, with another gear when the music demands it.

Winter was designed to work two ways: on its own, or as a cold-weather base layer under rosins like Pops when dry air and lower temperatures reduce their response. It needed to stay easy and responsive for loose, gestural playing, with another gear when the music demands it—without becoming gritty, gummy, or noisy.

Warm / Hot

Summer

Immediate catch that stays controlled when the temperature rises.

Summer was a different problem. In heat, soft rosins can become overly sticky or messy, so Summer had to deliver that familiar immediate catch on its own — while staying controlled at higher temperatures and still feeling right at normal room temperature.

Bassment Rosin FAQs

Still have questions? Text me directly: +1 848-209-1242 (Isaac)

What is the difference between Summer and Winter?

Summer has stronger initial catch with a cleaner release through the stroke. It is more of a standalone sticky-style rosin with the kick Winter gives you through loud or fast passages.

Winter has a more moderate start on soft or slow notes, with durable responsive grab that kicks in on loud or fast notes. It can also serve as a base-layer boost for your current rosin.

Both work well at normal indoor hall temperatures. Winter is generally best below 76°F / 24.5°C, while Summer is best above 70°F / 21°C.

Summer and Winter do not need fast swipes like some rosins. A gentle swipe speed works best. A few steady swipes are usually enough.

At an average room temperature around 22.5°C / 72.5°F, I usually use:

Winter: 2–3 swipes
Summer: 3–4 swipes

Winter usually lasts longer on the bow. Some days I do not add any more Winter at all.

For Summer, I reapply every day with 3–4 gentle swipes, and for a 2–3 hour concert I'll consider an extra swipe at intermission depending on repertoire.

Winter is softer and more cold-tolerant, so it works better in cooler rooms. Below about 21°C / 70°F, I may use a little more Winter.

Summer is firmer than Winter, but still plays like an active, sticky rosin under the bow. Summer does not melt in hot weather, even at 55°C / 131°F.

Above about 25°C / 77°F, I usually use a little less Summer.

If the room is 20°C / 68°F or below, Summer can start to lose cohesion, meaning it may scrape off and build up on the string instead of staying on the bow.

Yes. You can combine swipes of Summer and Winter to customize the feel.

Winter adds stronger grab through loud and fast passages. Summer adds stronger starting bite with a clean release.

Try adjusting the number of swipes of each depending on the room, the repertoire, and how much bite or follow-through you want under the bow.

Some rosins feel great at first, then powder away. Others stay soft, but feel noisy, gritty, or gummy.

Summer and Winter are built to stay consistent: strong, clean grab without powdering, drying out, or turning weird.

They're the only rosins with a 1-year money-back guarantee, so you can decide for yourself.

No. Summer and Winter were designed to be unaffected by humidity. Temperature matters, but humidity does not.

You can even do what I do and leave them out uncovered, though the tin is still useful for keeping dust off.

No fancy humidor needed.

No rehair needed.

If you're coming from a powdery rosin, you may notice extra buildup on the strings at first. That's normal: Summer and Winter can grab onto old powder in the bow hair and pull it out as you play.

Just wipe the strings, reapply, and play it in a few times until the buildup settles down.

You should be able to feel the difference right away, even on older hair.

Probably not. Sometimes Winter can be slower to break in brand-new hair in warmer temps.

Just start with Summer, or use a few swipes of a harder/drier rosin to get the hair going.

Yes! The countries in the checkout menu are just the ones already setup with automated checkout.

Shipping is still free worldwide when you order 2+ rosins.

If your country isn't listed, just email me and I'll confirm shipping and any customs fees so there are no surprises: bassmentrosin@gmail.com