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2-way Humidity Control Refills for Starter Kits

B49 Standard Refill Packs

Sale price$19.99
4.7
Rated 4.7 out of 5 stars
114 Reviews

Pack Quantity: 4 Pack
Replace Boveda packets every three (3) months. Just slip these refills into the Boveda Holder(s) from your B49 Standard Starter Kit and slide them back into your case. Set up a subscription to get replacements auto-shipped to you every three (3) months, so there's no lapse in humidity protection.
B49 Standard Refill Packs
B49 Standard Refill Packs4 Pack Sale price$19.99

Specifications

Product Details
Using Boveda to balance humidity in an instrument case:
  • Requires zero maintenance—no more filling messy hoses and snakes and wetting sponges
  • Maintains an ideal relative humidity range for instruments—40-60% RH
  • Prevents wide fluctuations in humidity that cause the wood to expand or shrink, and degrade its performance abilities

HOW TO USE:

BEFORE USING BOVEDA:

  • ALWAYS insert Boveda into a Boveda Holder before using in your instrument case. The holder acts as a liquid barrier if a packet is accidentally punctured while extending the life of your Boveda packets. The patented interior material allows water vapor to pass through to your instrument. The exterior is soft, like a polishing cloth, so it doesn’t scratch the finish.
  • DO NOT mix different Boveda RH levels within the same instrument case. 
  • DO NOT use other humidification products with Boveda in the same case because they will fight against each other and reduce the efficiency of Boveda.
STEP-BY-STEP INSTRUCTIONS:  
  1. Slip the Boveda pack into the pouch of its Boveda Holder. (DO NOT OPEN the Boveda itself.)
  2. Place in the case anywhere that allows for airflow and prevents puncture when you close the case: - Under the neck or headstock - On the strings
- Open area in the case
  3. Close the case's lid. Always keep your case closed when using Boveda.

HOW MANY SIZE 8 TO USE:

  • Boveda Double Holder: Refill with two (2) to four (4) B49 Standard Refill Packets
  • Boveda Single Holder: Refill with one (1) to two (2) B49 Standard Refill Packets
  • Directional Boveda Holder: Refill with one (1) B49 Standard Refill Packet

BASED ON THE INSTRUMENT THAT I PLAY, HOW MANY BOVEDA REFILL PACKS DO I NEED TO USE?

Use one (1) B49 Standard Refill Packet in a Boveda Holder for a(n):

  • Clarinet
  • Oboe
  • Ukulele
  • Viola
  • Violin

Use two (2) B49 Standard Refill Packets in the Boveda Holder(s) for a(n):

  • Banjo
  • Bass clarinet
  • Bassoon

Use four (4) B49 Standard Refill Packets in the Boveda Holder(s) for a(n):

  • Cello
  • Harp
  • Small guitar
  • Standard acoustic guitar or bass
  • Standard electric guitar or bass
  • Upright bass

PACKAGING:

  • 4-Pack: Packaged in a resealable high-barrier heavy-duty plastic bag with a zip closure. Each Boveda is not individually overwrapped. 
  • 12-Pack: Each Boveda is individually overwrapped. 
  • 20-Pack Brick: Packaged in a heavy-duty plastic bag that is resealable using its attached tape enclosure. Each Boveda is not individually overwrapped.
Unopened, Boveda can last up to 2 years.

LIFESPAN:

Replace Boveda 2-way humidity packs every three (3) months.

ACCURACY:

Achieves and maintains a constant relative humidity (RH) range between 40% and 60%, the industry standard for wooden instruments.

INGREDIENTS:

Food-grade salt, purified water, and a food-grade thickening agent sealed inside a leakproof membrane.

PRODUCT DIMENSIONS:

5.25"/13.34 cm x 3.5"/8.89 cm

Our Customer Say

91%would recommend this product
4.7
Rated 4.7 out of 5 stars
Based on 114 reviews
Total 5 star reviews: 99 Total 4 star reviews: 5 Total 3 star reviews: 5 Total 2 star reviews: 1 Total 1 star reviews: 4
Customers Talked About
Reviews Summary
Customers say these humidity control packs are highly effective for protecting wooden instruments like guitars, violins, cellos, and ukuleles. Many reviews mention their ease of use compared to traditional sponge-based systems, with users appreciating the "set it and forget it" convenience. Common feedback includes successful protection against dry climates, particularly in winter months and arid regions like Arizona and the Southwest. Frequent comments address their effectiveness in maintaining stable humidity levels within instrument cases, preventing issues like fret sprout, cracking, and tuning instability. While most praise their reliability and convenience, some note concerns about replacement frequency and cost, with a few reporting inconsistent performance in achieving target humidity levels.
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114 reviews
  • AD
    Art D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Excellent Product

    These little magical packages work wonders keeping guitars humidity just right and it’s a pleasure to open case to discover that no strings are sharp or flat due to humidity changes in my apartment. Thanks 🙏🏼.

  • JM Profile picture for Jeff M.
    Jeff M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Best for ukulele humidification.

    I’ve tried ALL of the humidifiers for stringed instruments. Boveda is the BEST - IMHO. I learned about them when I built humidors - and read the reviews.

    I wish I’d tried Boveda’s first. No fuss/muss and THEY WORK!

  • WM
    W. Michael M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Boveda-these humidifiers are the bomb!

    Love the humidifiers.! My Luthier has been after me for years to use humidifiers for my acoustic guitars. Finally, an easy application that works and is affordable.

  • CM
    christopher m.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    21 seconds ago
    Highly Recommended

    Great stable humidity for my guitar. Easy to use.

  • JM
    Joe M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    4 weeks ago
    Best humidity control for my acoustic guitars

    I've tried numerous humidity control systems over the past couple of decades and the Boveda 49% humidipaks are the best in my experience. I've been using them for a few years and they do an excellent job of keeping my acoustic guitars at the correct humidity level. Our winters here in the northeast are usually quite dry, and our summers are frequently humid. The 49% paks level things out. I keep my guitars in their cases when not in use and this helps to seal in the protection.